divide & remainder problem is one of my best area, but in this question, I give up!!
If r, s anad t have the same remainder when divided by 5,
what is the value of t?
1) r + s = t
2) 20 <= t <= 24
it has too much cases..
anyway, OA is C
somebody help!!
remainder problem how to solve?
This topic has expert replies
- Castor.kim
- Junior | Next Rank: 30 Posts
- Posts: 22
- Joined: Thu Aug 30, 2012 10:23 pm
- Jim@StratusPrep
- MBA Admissions Consultant
- Posts: 2279
- Joined: Fri Nov 11, 2011 7:51 am
- Location: New York
- Thanked: 660 times
- Followed by:266 members
- GMAT Score:770
Numbers that have the same remainder when divided by 5 - we only look at the one's digit:
0 and 5
1 and 6
2 and 7
3 and 8
4 and 9
1) Insufficient because of the numerous combinations
2) We know nothing about r and s
Together
If t = 20, then r and s can be 5 and 15 or 10 and 10
If T = 21 then r and s cannot both have a remainder of 1 and sum to 21
If T = 22 then r and s cannot both have a remainder of 2 and sum to 22
If T = 23 then r and s cannot both have a remainder of 3 and sum to 23
If T = 24 then r and s cannot both have a remainder of 4 and sum to 24
C
0 and 5
1 and 6
2 and 7
3 and 8
4 and 9
1) Insufficient because of the numerous combinations
2) We know nothing about r and s
Together
If t = 20, then r and s can be 5 and 15 or 10 and 10
If T = 21 then r and s cannot both have a remainder of 1 and sum to 21
If T = 22 then r and s cannot both have a remainder of 2 and sum to 22
If T = 23 then r and s cannot both have a remainder of 3 and sum to 23
If T = 24 then r and s cannot both have a remainder of 4 and sum to 24
C
GMAT Answers provides a world class adaptive learning platform.
-- Push button course navigation to simplify planning
-- Daily assignments to fit your exam timeline
-- Organized review that is tailored based on your abiility
-- 1,000s of unique GMAT questions
-- 100s of handwritten 'digital flip books' for OG questions
-- 100% Free Trial and less than $20 per month after.
-- Free GMAT Quantitative Review
-- Push button course navigation to simplify planning
-- Daily assignments to fit your exam timeline
-- Organized review that is tailored based on your abiility
-- 1,000s of unique GMAT questions
-- 100s of handwritten 'digital flip books' for OG questions
-- 100% Free Trial and less than $20 per month after.
-- Free GMAT Quantitative Review