The last question might be tough if the options were very near to 42 but it could be solved easily by eliminating the other options as it said it is going in a linear way. Thanks Ninja team for this series.

@harryduthie

2 жыл бұрын

Hi A K, Thank you for this! When I wrote this question, I spent a fair bit of time trying to find all the ways someone could screw up the algebra. Each of the wrong answers shows one way I thought someone might do this question wrong. With all that work, I didn't think of your method at all. You're absolutely right: your method makes this question much easier. I think this shows how hard it is to write a good GMAT question! Thank you for watching and commenting, I hope you're enjoying the series!

@AK-dq2qv

2 жыл бұрын

@@harryduthie yes Harry. Would you mind if I request you guys to do a similar series for Verbal too ? As a non native, verbal is a pain for many.

@harryduthie

2 жыл бұрын

@@AK-dq2qv keep an eye on our channel. We've got two more weeks of quant videos and then we'll get started on some verbal material. I hope to see you there!

@alrightjudgeme

6 күн бұрын

For last qn, if y= size of bonus and x = number of clients, will we still arrive at the same answer?

What kind of magick is this? Not all heroes wear capes, some of them teach us how to solve GMAT problems efficiently. Thanks Sir.!

@GMATNinjaTutoring

2 жыл бұрын

You're too kind, thank you so much, Sonoman!

For Question 4 you can also just calculate (2100 / 150) + 3 without setting up any formula, as they added up 2100 cars by missing 150 cars per week. Anyway, your videos are very helpful, thanks a lot!

@TheTechieSab

5 ай бұрын

why 2100, why not 4200 since that is the number of cars left

@PiteroZaur

5 ай бұрын

@@TheTechieSab as you 700*3(weeks left) = 2100 and you have to subtract the 2100 from 4200 as it was planned and you can treat is as 3 weeks and then add these 3 weeks so it is (2100/150) + 3

Harry, you're a hero. Cheers!

Can’t thank you enough for these videos. Cheers!!

@GMATNinjaTutoring

Жыл бұрын

Thank you so much for the kind words. Have fun studying, and good luck with your exam!

Love your videos Harry, straight to the point and effective. Thank you!

@harryduthie

Жыл бұрын

Thank you, Gregory! I'm so pleased you're finding the video's helpful

@xAccident

Жыл бұрын

@@harryduthie No worries. I have a question for you as well. I have done well in maths throughout my educational years, however, on my first official GMAT practice test I scored a measly Q29. Therefore, I have been watching and taking notes from your GMAT Quant Course to improve my performance, as I believe I am unable to adeptly recognize and apply the mathematical knowledge required to succeed in the quantitative part of the GMAT. I was wondering if you think that this is a good strategy, or if you think I would be better off spending my time practicing differently? Thanks for your time :)

For last question, I did: 80000-20000=60,000. The difference between new clients is 46-22=24. Then, using direct proportion: 60,000 is to 24, as 10,000 (the bonus difference 80,000-70,000) is to 4. Finally, 46-4=42 ;)

@GMATNinjaTutoring

6 ай бұрын

That's a great way to answer this question! Thank you for sharing

After watching previous 4 videos is this series, i actually felt a bit confident attempting questions in this video. Logic logic logic . Thanks. 😊

@GMATNinjaTutoring

3 ай бұрын

Awesome! That's exactly what we want to hear. Even as you encounter new topics, hopefully the ideas in earlier videos will continue to help you improve. Have fun studying, and keep us posted on your progress!

Hi Harry, I approached the last question (59:00) - As 70,000 is between 20,000 and 80,000, The number of new clients should also be between 22 and 46 (as the relationship is linear ) The only choice between 22 and 46 is B (42) so B is the answer is this approach valid?

@harryduthie

Жыл бұрын

Hi Sukhmandeep, Your method is definitely valid for this question! However, I'd still take a look at the method in the video so you understand the principles behind it. When I wrote this question, I spent a some time trying to find all the ways someone could screw up the algebra. Each of the wrong answers shows one way I thought someone might do this question wrong. I missed the point that there's only one answer choice between 22 and 46 and I would write the answer choices very differently if I did this video again. It's very unlikely the official question writers would miss something like that if they wrote a similar question. So, unfortunately, you might not be able to rely on your method elsewhere. It's a great sign you can be that flexible when approaching a problem, though! Thank you for the question, I hope that helps!

@srilanka739

Жыл бұрын

@@harryduthie Thanks Harry - correct that the main takeaway is the method actual gmat wont be this easy

question 2 confused me because it said when p is prime. it didn't say when p^ is prime. so I thought they were referring to the P that is on the right side of the equation. IDK it just confused me

@noahwinter4780

Жыл бұрын

same

Question 2 was confusing at first glance. But appeared to be an easy question 😤. Then came choosing the answer choices. haha who'd have thought to normalise the numbers

I see some folks in the comments talking about the different ways they solved the last question. Here is mine; I drew the Coordinates and used similar triangles and cross-multiplication to find the missing side. I got 20. so 20 + 24 = 42

Please correct me if I'm wrong but for the last hard question, just by looking at the answer choices, we can conclude it's 42

thank you

Another 57:15 way of doing question no.7 We know 1km = 250 x 4 But cost of 250 m = 240 Cost of rest 250 m = 30 X 3 = 90 So 240+ 90 = 330 Now check for the options which gives us final answer 330 Option A = 210 + 30(4) = 210 + 120 = 330

Is this thought process correct for the last question? Linear relationship means for every incremental client there's a bonus attached. So i did 80000-20000/46-22 to get bonus per additional client. Then the answer, 2500, is used in 70000-20000/2500 to get 20 additional clients. 22+20 =42

@harryduthie

2 жыл бұрын

Hi Shah! That process looks good to me! One of the things we discuss with our students is the importance of flexibility. If you're comfortable with understanding multiple different solutions paths to a problem, you'll have an advantage on the GMAT. Thank you for your comment and for providing an alternative way of looking at this question.

For question 8 I don't see why we should do maths at all since answer choices are well spaced, 70k can't come from more signups than 80k hence C,D & E out, A is out for the exact opposite reason and we're left with B

@GRENinjaTutoring

9 ай бұрын

Yes - that's a great point! As you suggest, there are sometimes questions where logic alone will help you eliminate wrong answers, even without any calculations. If you're lucky, maybe you'll have only one left, as happens with this problem. Thanks for the comment!

For the first question, there is a more efficient way of doing it. Just write the sum of their ages in two different ways, which are given according to the question, and then solve for x, where x is Badshah's current age in both cases. S = (x+18) + x S = 3x + x.

For age questions like question 1, my confusion is always when to put parentheses around the numbers and variables. Instead of using the parentheses, I wrote A+5=3B+5, and then substituted B+18 for A, did the math, and I eventually got 36 as my answer, but I want to develop good habits since this is happened before. When do I use parentheses, like (A+5)=3(B+5), because the way I did it, I did not get 15, because I didn't put parentheses.

@GMATNinjaTutoring

6 ай бұрын

The key in all these word problems is to be as clear as possible about what your variables mean and stick to that definition throughout the question. In this case, let's make A represent Anneka's age and B represent Badshah's age RIGHT NOW. From that, we can create our first equation and say A = B + 18. The next part of the question tells us "In five years' time, Anneka will be three times as old as Badshah." Given our earlier definition that A and B represent Anneka and Badshah's age RIGHT NOW, Anneka will be (A + 5) years old and Badshah will be (B + 5) years old IN FIVE YEARS' TIME. This means we can say that what we use to represent Anneka's age five years in the future will be three times the thing we use to represent Badshah's age. We can represent this as (A + 5) = 3(B + 5) If you continually think about what your variables represent, it should be easier to figure out when to use parentheses. I hope that helps!

Hello GMAT Ninjas! Thanks a lot for this amazing series! For Q7, you added 210$ by default. What if the company only installed 100 m and that's it? The question does not explicitly say that the company always installs at least 250 m.

@GMATNinjaTutoring

8 ай бұрын

You're right. There's a gap in the wording of the question for fences under 250m. The second sentence of the question should read "A company charges $240 for the first 250m of fencing *or length of fencing up to 250m* that it installs." Thank you for pointing this out!

Can I get an elaboration of Q4? The problem makes it look like that the number of cars the team had to clean was 4200 in total and not for 3 weeks. Am I missing a nunace here that I should note? Any help would be appreciated. Thanks!

@GMATNinjaTutoring

8 ай бұрын

The start of the question tells us "To meet their quota, a team has to clean 4200 cars in the NEXT three weeks." Later in the question, we're told "...they have only cleaned 550 cars per week UNTIL NOW." The information contained in these two parts of the question suggests that we've been dropped into the middle of this situation. The team has been cleaning 550 cars per week for an unknown number of weeks, and now has to clean 4200 cars in the next three weeks (1400 cars per week) to hit their target. If they'd stuck to their initial plan of cleaning 700 cars per week for the full duration of this scenario, they would have been on track to hit their target. We can use these two paths the team could have followed to reach their target to give us the two sides of the equation we found at the start of the solution, with x representing the total number of weeks available to the team to reach their quota. I hope that helps!

Hi Harry! For question 6, the question is asking for the additional amount that EACH of the friends will pay. Does that not mean we have to further divide the answer by F-G friends?

@GMATNinjaTutoring

7 ай бұрын

The first thing we did in the solution to Q6 was to find the amount of money that each friend would have to pay both before and after the G friends decided not to make the trip. We then subtracted the amount of money each friend would pay before the G friends decided not to make the trip from the amount of money each friend would pay after the G friends decided not to make the trip. This means we've already taken the idea that the question asks for the additional amount of money that each of the friends will pay into account. I hope that helps!

Thank you so much for the video series. Its super helpful. For the last question, I did solve by approximation, since the answer choices are spread far apart. Since $80,000 is closer to $70,000 and $80,000 bonus is given to an employee who signs 46 clients- an employee who receives a bonus of $70,000 would have signed a number of clients closer to 46. Since only 42 is close to 46, that should be the answer. Is this approach in the exam too risky? Or should I always go with the straight line approach?

@GMATNinjaTutoring

8 ай бұрын

One of the things we learned as we made this series is just how hard it is to write a good GMAT question. Each of the wrong answer choices in this question correspond to one way someone could mess up the algebra. After going through as much testing as we had the time for, we thought these would be good options for the wrong answers and this would be a tough question. Then we published the video and received a few comments like yours that suggested the wrong answers we came up with were too far apart and made the question far too easy. If we could rewrite the question, we'd make the answer choices much closer together to try to diguise the answer a little better and prevent the method you suggest from being an option. That was probably way too much information ;-), but the punchline is this: if you can see which is the correct answer in the question in the way you did here, great! However, it's much more likely you'll need to go through the process of doing the algebra, so I'd make sure you understand the method shown in the solution so you've could use either method the next time you see a question like this. I hope that helps!

Heyy, In question shoudn't statement 2 be enough to find thomas' salary? I mean we can put sylvian's salary in the equations and find the number of years and can find thomas' salary later.

@harryduthie

Жыл бұрын

Hi Arshdeep, From statement 2, we can find out how long Silvan has worked at the company but that provides no information that's helpful to find Thomas' salary. To find Thomas' salary later, you'd need the information contained in statement 1. However, this means statement 2 is not sufficient to answer the question. I hope that helps!

last question was the easiest... solved under 10 sec using elimination

@poojasharma29002

8 ай бұрын

Do you mean elimination as assumption or is there any other method?

Hello GMAT Ninjas! Thanks a lot for this amazing series! For Q6, why is it "new payment - old payments"; and not "old payments - new payments"?

@GMATNinjaTutoring

8 ай бұрын

The reason why I decided to find "new payment - old payments" is that the question asks us to find "the additional amount...that each of the remaining friends would have to contribute..." This suggests that the new payment will be higher than the old payment, and we'd get a positive answer if we found "new payment - old payment." It's definitely possible to answer Q6 by finding the value of "old payments - new payments," but this leads to some complications later in the question. If we do work through the question this way, we get an answer of -dG/F(F-G) which doesn't quite match any of the answer choices. We also know that d, F, and G are all positive values and F > G from the information provided in the question. This means that -dG/F(F-G) is negative, but it doesn't really make sense for the "additional payment...that each of the remaining friends would have to contribute" to be negative. We need to remember that this value should be positive, so all we need to do to find the correct answer is multiply -dG/F(F-G) by -1. I hope that helps!

@Amine-fo2qw

8 ай бұрын

@@GMATNinjaTutoring this is Phenomenal!! A Massive thank you, and hope you have a wonderful week!

Peace and Greetings, 8:01 why divide by two? Is that a rule? Can you elaborate ?

@harryduthie

Жыл бұрын

Hi Daniel, I divided by two because the equation I had at that point was 2B = 8 and I wanted to find the value of B. The way I did that was to divide both sides by 2, giving B = 4. I hope that helps!

For question 8 when trying to solve it I used the number of clients for the x axis and found that b=-35 it really threw me off and made me belive I made a mistake. After all how can a bonus be negative ? But after solving from y as the 70 I did end up with 42. This makes me wonder if I should not pay too much attention to the underlying meaning of the question, but that goes against the what you guys have been saying of thinking about the question. Could it be that the values of the exercise were overlooked and we wont find this in the GMAT ?

@harryduthie

Жыл бұрын

Hi Bres, You're right that it's unlikely you'd end up in this scenario in the real exam. If I had the chance to rewrite this question, I might add in an extra sentence that said that bonuses were given to those that signed a minimum of 15 clients, removing the chance that someone would get a 'negative bonus'. This is the sort of thing that would have been picked up during testing, but we definitely didn't have anywhere near as much time to review and test these questions as the official question writers have for 'real' GMAT questions. I hope that helps!

in the third question, why would I not plug in the salary for silvan and solve for y, then use that answer and add 6 to it to get tomas' years?

@harryduthie

Жыл бұрын

Hi Mike, You could do that, and it would work. Both pieces of information together are sufficient to answer the question. However, in a DS question, we only need to check both pieces of information as a combination once we've shown that (1) and (2) are insufficient on their own. Since the first part of the solution shows that (1) is sufficient to answer the question by itself, we'll don't have to check whether both pieces of information are sufficient as a combination. I hope that helps!

@kelvincheng3103

Жыл бұрын

Pay attention to how they answer with AD over BCE, this helped me understand how to answer data sufficiency questions, before I was totally confused. A: If statement 1 alone is sufficient D: If both statements ALONE we sufficient B: If statement 2 alone is sufficient C: If both statement alone were not sufficient but together are sufficient E: None of them were sufficient So basically you need to check each statement by itself, first statement 1, then statement 2. As he explained in this exercise, statement 1 was sufficient so you scratch BCE, because if statement 1 alone is sufficient but statement 2 alone is not sufficient then you choose A; If statement 1 and 2 both ALONE are sufficient then you choose D. Note that if statement 1 was sufficient you can't choose C (that's why you scratch it as soon as statement 1 is sufficient) because it says if BOTH ALONE NOT SUFFICIENT, but TOGETHER SUFFICIENT. In the case the statement 1 is not sufficient then you cross AD. If statement 2 alone is sufficient then you choose B; But if statement 2 alone isn't sufficient then you can cross B too and you are left with C and E. If together they can answer the question then C if not then E. Tip: To answer remember you don't need to find the final answer as long as you can push the question to find all the variables need to solve the equation is good enough; Nor you need to answer the question correctly, for example: If the question is something like: is x > 5? but your answer is x 5, so you select your answer accordingly. Previously I thought that if I couldn't answer if X > 5 correctly then the statement wasn't sufficient.

@edatelci4501

10 ай бұрын

@@harryduthie then shouldnt the answer be D, instead of A? Are there more than 1 right answer?

@harryduthie

10 ай бұрын

Hi @@edatelci4501, we can answer the question using the information in statement (1) alone, but we cannot answer the question using the information in statement (2) alone. This means the answer to the question is (A). While we COULD use the information in both statements combined to answer the question, there's no need to do this as we already know the answer is (A). We should only check whether both statements combined are sufficient if we know each individual statement is not sufficient. If you feel you need a refresher on how Data Sufficiency questions work, check out the link to Episode 0 I've put at the bottom of this comment. I hope that helps! kzread.info/dash/bejne/gH5qztZshrC0k7g.html

@edatelci4501

10 ай бұрын

you are the best! thank you @@harryduthie

Question, on Question 5, the statement "per 20 weeks during the spring and fall" - The meaning I took from this is that in spring the rental is 20 weeks and 20 weeks in fall. A total of 40 week for both seasons. (I Know if you sum Summer and Winter the year giver you 20*2+16+16=72 and there are only 52 weeks in a year, so it wouldn't make sense but why would you know there are 52 weeks in a year, that information can easily be forgotten during the gmat) The answer I got was still E, but I want to know what mistake I made during the reasoning of the question

@harryduthie

Жыл бұрын

Hi Delfin, You make a good point that the question isn't as clear as it probably could be. The question writers for the real exam have much more time to test their questions and uncover problems like this than we did. If I had the chance to rewrite the question, I might add in a comment that confirms there are 52 weeks in a year or say "10 weeks during the spring and 10 weeks during the fall." The good news is that this information isn't vital to answer the question as it doesn't matter whether you think a year consists of 52 weeks or 72 weeks, the answer will be the same. I hope that helps!

@delfin3701

Жыл бұрын

@@harryduthie Thanks, great Videos, they are really helpful

for quesiton 2. why don't i solve for p. 12 with hat = 3 * p to find out what p is. i mean i have the solution with 12 hat don't i?

@GMATNinjaTutoring

8 ай бұрын

You can't solve for p in this question, as you're given p. When we're asked to find 12^, the value of p is 12. Since 12 is not a prime number, we can put 12 into the 3*p formula to get 36. This means 12^ = 36. We can follow a similar process to find the value of 29^. In this case, p = 29 and we need to decide which formula to put 29 into, based on whether 29 is a prime number. I hope that helps!

Good job Harry. Question #4 The Algebra looks great, but questionable answer. 17 weeks required to reach their quota of 4200 cars ? Even in their slow pace 550 per week. the team can clean 9,350 cars in 17 weeks. The team will need 17 weeks if they do only 247 cars in a week. So Its not clear.

@harryduthie

Жыл бұрын

Hi David, The team's quota isn't 4200 cars, that's the number of cars they need to clean in the final three weeks of the task to reach their quota. From the algebra, we can determine the team had 17 weeks to complete the task. If the team had worked at their planned rate of cleaning 700 cars per week for 17 weeks, they would have cleaned 11,900 cars. This 11,900 cars is their quota. I hope that helps!

@davide7491

Жыл бұрын

@@harryduthie Definitely it does help. Thank you. By the way the practice Q#208 on the OG book(2022) page 144, is very similar to this situation. And Solved it perfectly using your strategy.

these killed me

@lolritz9880

Жыл бұрын

I AM RESURRECTED, questions 5-8 werent too bad for me! (an update no one asked for yayy)

For question 3 I think we don't need any calculations, it's that starting salary is $48,600 and annual raise is $3,600, both fixed for all employees.

@GMATNinjaTutoring

9 ай бұрын

Hi there, thank you for your comment! There are a couple of things to say about it: firstly, when you first start a job at a new company, you've worked at the company for zero years. This means that y = 0 on someone's first day, so their starting salary is $45,000. Secondly, you can know the starting salary is $45,000 and it increases by $3,600 each year, both fixed for all employees, and you still can't answer the question without additional information. This question asks us how much greater is Tomas' salary than Silvan's, so we need to know how long each of them has worked at the company or how much longer one of them has worked there compared to the other. This is why the information in statement (1) is sufficient to answer the question, and the information in statement (2) is not sufficient, meaning the answer to this question is (A). I hope that helps!

@uppermedic3560

9 ай бұрын

Yes you're right, starting salary is 45k, and this is what I meant we just need to know the difference in years worked by each, thank you@@GMATNinjaTutoring

@rikhrajghosh9897

6 ай бұрын

Please define me what do u state by the ans.A

The wording in Question 7 is so bad that i couldn't even figure out what is being said. It took me 10 minutes to understand the "up to" situation lol. If I see a question like that on GMAT I'll just skip sorry xd.

@marinabaskakova2333

Жыл бұрын

Same! The “length of fencing up to…” wording is too clumsy.

@maconeljames6055

10 ай бұрын

I don’t see how it’s not C

the first question is bothering me. In 5 years time Anika will still be 18 years older than Badshah (for example if i have a sibling that is 2 years younger than me, then they will always be 2 years younger than me, whether its five years or ten years or a hundred years out) so that will essentially cancel out and we can write 3B=A right? its not like the age gap between then will get larger/smaller… so why is the passage saying in 5 years time anika will be 3 times older than badsha shouldn’t she be always 3 times older or 18 years older than Badsha? Thanks

@harryduthie

Жыл бұрын

Hi S, Anika will always be 18 years older than Badsha, but she won't always be 3 times his age. If my little brother is 6 years old and my little sister is 2 years old, then my brother's age is three times my sister's age and he is four years older than her. However, next year my brother will be 7 and my sister will be 3. The gap between their ages is still four, but he is no longer three times as old as she is. The key to this question is being very clear about what your variables mean. The method I used in the video defines A and B as Anika's and Badsha's ages *now* . Since Anika's age will only be triple Badsha's age in five years' time, the second equation was A+5 = 3(B+5) to take the extra five years into account. Another way to answer this question would be to define A and B as Anika's and Badsha's ages *in five years' time* . If you do that, then the two equations are A = B + 18 and A = 3B. You can definitely do this, as long as you're clear about what you have defined A and B to be at the start of your solution and you stick to that definition throughout. I hope that helps!

@user-cy9xp6zu2s

Жыл бұрын

@@harryduthie I see. Thank you for the very clear and very prompt response.

I didn't understand one thing in salary question Why can't we say statement 1&2 both together are sufficient When we use both statement we can find out the exact salary as well as the difference I agree with statement 1 it is possible to get difference but it is possible with using both statement as well Could u plz clarify or anyone?

@GMATNinjaTutoring

8 ай бұрын

You're absolutely right, statement (1) and (2) together are sufficient to answer this question. However, with the way Data Sufficiency questions work, we want to check if each statement alone answer the question before checking if both of them are sufficient together. In this question, statement (1) is sufficient and statement (2) is not, so the answer is (A) and we don't need to worry about checking both statements together. For more information about this process and how to approach a DS question, check out video 0 in this series through the link below. I hope that helps! kzread.info/dash/bejne/gH5qztZshrC0k7g.htmlsi=PVdWVHbt_VVu1pJ_

@dylanneal8244

8 күн бұрын

@@GMATNinjaTutoring I am also slightly confused on this question, and I had the same thought as @johnybrave78 . How is statement 1 alone sufficient to answer the question? From the video explanation, I understand that you can create an equation to find the difference between their salaries by using statement 1. However, this does not directly give us a value for the difference in their salaries. By using statement 2, you can plug in 81,000 for the variable d work backwards to solve for y to determine the years that Silva has worked at the company. Then you can use statement 1 where 6 would be added to the value of y that was calculated in statement 2. Using the value of y+6 and plugging into the equation d=3.6(y+6)+45, you know there will be an exact salary value . From here, we can solve for the difference since we know that we can find an exact salary value for Tomas and we already know the value for Silvan's salary is 81,000. If you could explain further that would be great. I have really appreciated these videos!

Do you really need to solve the last question? Because I chose 42 as the answer because that's the only answer choice landing between 46-22 since 70k is between 20k and 80k

@harryduthie

Жыл бұрын

Hi Daniel, Thank you for this! When I wrote this question, I spent a bit of time trying to find all the ways someone could screw up the algebra. Each of the wrong answers shows one way I thought someone might do this question wrong. With all that work, I didn't think about needing more answer choices between 22 and 46. You're absolutely right: your method makes this question much easier. I think this shows how hard it is to write a good GMAT question! Thank you for watching and commenting, I hope you're enjoying the series!

@danielgomes1631

Жыл бұрын

@@harryduthie yes Harry, the series has been really helpful for my GMAT prep

Sry, but solution of seven does not makes sense. 4p coming from an "imagened" perimeter which the question is not telling us. It just says "1km = 1000m" does not mean perimeter is 1 km... So either you missed something in the question or you are mixing up stuff. Solution should be B not A. Please explain!

@GMATNinjaTutoring

7 ай бұрын

To illustrate what's going on here, let's use an example. For now, let's assume the length of the fence will be 4.6 km. This means there will be 18 full 250m sections of fencing plus a 100m bit of fencing at the end. From the question, we're told that after the first 250m of fencing, the company will charge "$30 for each additional 250 meters of fencing or length of fencing up to 250 meters", so the company would charge $30 for the 100m of fencing at the end of our 4.6km. This means we have 19 total 'sections' of fencing to charge for. If we do 4 * 4.6 we get 18.4, so we want to round that value up to the nearest whole number, and we can do that using the {x} symbol. If we do {4*4.6} we get 19 which is what we want. However, we can't do 4*{4.6} as that would give us 4*5 = 20, which is one too many 'sections' of fencing. Once we know we can find the number of 'sections' of fencing by doing {4*p} (using exactly the same method as in the previous paragraph, but now p is the perimeter of the field in km), we can figure out the charge for the total fence. The company charge $240 for the first 250m of fencing and $30 for each additional 'section', so we need to subtract one from the total number of 'sections' of fencing we calculated earlier so that the first section isn't counted twice. This means the final charge for the fencing will be: 240 + 30( {4p} - 1)= 240 + 30{4p} - 30 = 210 + 30{4p}. I hope that helps!

Bro for question 8, if the relationship is linear, since $70k lies between $20k and $80k, the number of clients should also be between 22 and 46. There is only one option that corresponds to that. Why do all the math?

@GMATNinjaTutoring

6 ай бұрын

One of the things we learned as we made this series is just how hard it is to write a good GMAT question. Each of the wrong answer choices in this question corresponds to one way someone could mess up the algebra. After going through as much testing as we had the time for, we thought these would be good options for the wrong answers and this would be a tough question. Then we published the video and received a few comments like yours that suggested the wrong answers we came up with were outside the 22 to 46 interval and made the question far too easy. If we could rewrite the question, we'd make sure multiple answer choices were between 22 and 46 to disguise the answer a little better and prevent the method you suggested from being an option. That was probably way too much information ;-), but the punchline is this: if you can see which is the correct answer to a question in the way you did here, great! However, it's much more likely you'll need to go through the process of doing the algebra, so I'd make sure you understand the method shown in the solution so you could use either method the next time you see a question like this. I hope that helps!

For question 6 instead of going through all calculations. First time each person pays = d/F Amount paid by G people = dG/F Distribute this amount within remaining student (Extra amount) = dG/F(F-G)