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What is the value of x? - OG prac test

https://s3.postimg.org/faczprx4j/image.jpg Another geometry question, I know my weakness isn't blatantly obvious or anything :roll: [spoiler]answer was c. My thought process for this was: I needed to know or reduce some combination of equations to come up with ∠RSQ and ∠UST. 1) QR = QS means âˆ...

by Kuros

Sun May 07, 2017 12:24 am
Forum: Data Sufficiency
Topic: What is the value of x? - OG prac test
Replies: 2
Views: 1176

Yeah I hadn't known about the co-prime rule and got stopped dead once I worked it to 2^50*(50!), thank you guys very much!

by Kuros

Thu May 04, 2017 8:19 am
Forum: Problem Solving
Topic: what is the smallest prime factor?
Replies: 7
Views: 2977

what is the smallest prime factor?

Image

a) Between 2 and 10
b) Between 10 and 20
c) Between 20 and 30
d) Between 30 and 40
e) Greater than 40

Source - OG diagnostic test

by Kuros

Thu May 04, 2017 12:21 am
Forum: Problem Solving
Topic: what is the smallest prime factor?
Replies: 7
Views: 2977

wrong section, delete please

sorry, posted from a bookmark, please delete this post

by Kuros

Wed May 03, 2017 11:06 pm
Forum: GMAT Math
Topic: wrong section, delete please
Replies: 1
Views: 1725

Exponentials and prime factors -OG

What is the greatest prime factor of 4^17-2^28?

a)2
b)3
c)5
d)7
e)11

by Kuros

Wed Apr 19, 2017 4:02 pm
Forum: Problem Solving
Topic: Exponentials and prime factors -OG
Replies: 4
Views: 1699