Factorials Made Easy - Advanced GMAT Number Properties
Struggling with factorials on the GMAT? The sample question in this video and the tips I provide will teach you core number properties concepts that will enable you to solve similar factorial questions with ease on test day.
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This was a great question. I am a first-time bomber of the GMAT and I am currently studying for it to take it before thanksgiving (full time job and having a family makes it pretty hard to dedicate time but I'm figuring it out!) I paused the question as soon as the video loaded to see if I could solve the problem and it was a great boost to my confidence because I was able to solve it in ~45 seconds. Here's what I wrote on my paper: p = 100 thru 299 q = 200 thru 299 p = 299!/99! q = 299!/199! p/q = (299!/99!)/(299!/199!) = (299!/99!)*(199!/299!) = 199!/99! Your videos have been so unbelievably helpful in programming my brain to look at problems a certain way. Thank you so much Brett!
@dominatethegmat
4 жыл бұрын
Awesome, Edmund. Thanks for sharing. I'm glad you've been finding this channel helpful. Good luck on the real thing and let us know how it goes. And have a great Thanksgiving with your family!
I've struggled so much with this type of problem but I finally understand it, thank you!
@dominatethegmat
5 жыл бұрын
My pleasure, glad this video helped you have a breakthrough. Good luck the rest of the way and let me know how else I can help.
So helpful! Thank you!!!
@dominatethegmat
4 жыл бұрын
You're welcome!
that was very helpful!
@dominatethegmat
5 жыл бұрын
Great, I'm glad you enjoyed it!
Thanks so much
@dominatethegmat
5 жыл бұрын
My pleasure, glad it helped!
TNX
@dominatethegmat
5 жыл бұрын
My pleasure! Glad it helped.
Sir is it good to solve this question without writing? If it's possible please share us hard questions more. Myself i have a problem in geometry.
I'm amazed by how you write those with mouse
@dominatethegmat
4 жыл бұрын
I actually use a trackpad with a digital pen that plugs in to my USB port and acts like a mouse. Much easier to write that way! But thanks for the compliment. I hope you found this video helpful.
@fadilnatakusumah195
4 жыл бұрын
@@dominatethegmat haha i knew it. I knew that was too good to be made with mouse. Yes yes, your videos are very helpful, thank you so much
@Dominate the GMAT is it possible to have a video for using factorial in trailing zero question?
@dominatethegmat
3 жыл бұрын
There's an example or two like that in the GMAT Official Guide, and I do have video solutions for all of those questions included with the Gold and Platinum packages of my course. Is there a particular sample question you're curious about?
@coulibalychigata9174
3 жыл бұрын
Thanks a lot for your reply, yours videos are so helpful. Of course i am curious about that topic. 🤣.
What level question would this be?
@dominatethegmat
5 жыл бұрын
I'd say it's a mid- to upper-600 level question.
Dude your so fucking cool
Was 299-100 / 299 - 200 = 199 / 99 only a solution related to chance?
@dominatethegmat
3 жыл бұрын
Yes. It's good to be lucky sometimes, though!
C is the answer I think