Erika is a great teacher! Kudos to Magoosh for getting her on board. 😀

@MagooshGMAT

3 жыл бұрын

We are lucky to have such great instructors!

@jonashill2420

10 күн бұрын

seriously! if she's not in it i don't watch 😂

You are awesome! Thanks to the whole Magoosh team!

Great video!

So useful omg

THANKS ERIKA YOU ARE AN AWESOME TEACHER!! ALL THE ADVICES AND ANECDOTES WHERE REALLY USEFUL!!

Hi. Great video as always. The equilateral traingles can be found easily. Draw a circle. Mark 15 equidistant dots on it (as given in the question). To draw an equilateral triangle with 1st dot selected, select 5th and 10th dot. For equilateral triangle with 2nd dot, select 6th and 11th dot and so on which gives 5 equilateral triangles.

@MrIndman

Жыл бұрын

1, 1+5, 1+10; 2, 2+5, 2+10;....

Thanks Erika... Was really helpful.. looking forward to some more videos.

@MagooshGMAT

2 жыл бұрын

Awesome, we're glad you liked it! Thanks for commenting :)

Thanks! This helped.

my favourite teacher

@MagooshGMAT

3 жыл бұрын

Woohoo! Thanks for sharing :)

Thank you so much to Erika and the Magoosh team

@MagooshGMAT

3 жыл бұрын

Our pleasure, thanks for stopping by! 😁

Wow ! This is a classic one. Loved it !

@MagooshGMAT

2 жыл бұрын

Glad you liked it! Thanks for the comment :)

A very nice explanation. Thank you 🙏

@MagooshGMAT

2 жыл бұрын

Woohoo! Glad you liked it :) Thanks for stopping by!

Erikaaaa is backk!!!!

Thank you for the video. Gained good knowledge

@MagooshGMAT

3 жыл бұрын

Thanks for the comment, we're glad it was useful for you! :)

How the last question was solved blew my mind!

@MagooshGMAT

3 жыл бұрын

Sometimes these tough problems aren't as tough as they seem!

Great video! Thank you!

@MagooshGMAT

9 ай бұрын

You are welcome!🙌

Thanks Erika!

Great Tips 👍

hi erika! where can i find your teaching for gmat in magoosh.

Hi Erika/Magoosh, pardon me but I'm not able to find the blog article which explains the last problem (circle/triangles). Can you please share the link?

@MagooshGMAT

3 жыл бұрын

Hello there! Here's the one you're looking for :) magoosh.com/gmat/difficult-gmat-counting-problems/

@learningdesignstudios

3 жыл бұрын

@@MagooshGMAT Thank you team!

After seeing all of your GREAT explanations (thx 4 that), I only have one question, and I'm afraid is kind of a dumb one (lol). Last problem, the one with the equilateral triangles... The 15 factorial (15!) was 15 x 14 x 13. My question is: Doesn't the factorial (!) mean 15 x 14 x 13 x 12 x 11 x 10 and so on til 1? I mean, how do you know that you needed to stop at 13? Thanks

@Marshmellow3971

8 күн бұрын

When you take a combination of xCy, you’re dividing X!/Y!(X-Y)! In this case 15!/3!(12!), you can express 15! As 15x14x13x12… and 12! As 12x11x10… when you divide 15!/12! Everything after 13 cancels out, because it is also part of 12!.

Awesome video

@MagooshGMAT

Жыл бұрын

Thank you!🙌

Great!

@MagooshGMAT

Жыл бұрын

Thank you!

Hello, Erika Is a specialised tutoring plan available for GMAT currently I already have a strong base in quants and need to advance it and have medium verbal ability. Planning for gmat in 4 months !!

@MagooshGMAT

5 ай бұрын

Not at Magoosh right now, but there are services elsewhere. Good luck!

If you simplify 2/6 in the first question , it becomes 1/3 raised to power 4 it becomes 1/81 1-(1/81) = 80/81 which E. can you explain why you simplify in the 2nd question and not in the 1st question

@therandomthings9128

2 жыл бұрын

You solved wrong.

What happened to Prepscholar GMAT?

For question no 2. Why could we not just choose (1/3)^8??

@therandomthings9128

2 жыл бұрын

Because they specifically asked for AT LEAST 1 blue marble.

Sorry bit you got me lost at 11:19. I don't understand how you did the divisions of the factorial.

@MagooshGMAT

11 ай бұрын

You can review how to divide factorials here: gmatclub.com/blog/2012/01/gmat-permutations-factorial-trick/

I solved all 😅

@MagooshGMAT

Жыл бұрын

Great job!

Ok

@MagooshGMAT

10 ай бұрын

👌

You said the write answer is 80 why you change it to 77 how we can know that

@MagooshGMAT

Жыл бұрын

Even though the total number of possible combinations is 80, there is a restriction in the question: "the paper, ribbon, and bow cannot all be the same color." So that reduces the number of combintions.

I have an exam after one week can you help me please is there any one here can help me ?

@MagooshGMAT

Жыл бұрын

We'd recommend checking out other videos for practice and focusing your studies on the areas your struggling with the most. Good luck!