BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

number properties

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 1084
Joined: Fri Apr 15, 2011 2:33 pm
Thanked: 158 times
Followed by:21 members

by pemdas » Tue Jan 31, 2012 6:28 pm
N=3a+1 and N=10b+2
find r such that N=30c+r?

3a+1=10b+2, when b=1 a=11/3 which is non-integer
when b=2 a=21/3=7

N=3*7+1=11

11/30 is not among our answer choices but 22 is there

e
Success doesn't come overnight!
Top
Post new topic Post Reply
• Page 1 of 1