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f(n)

by sampath » Fri Aug 12, 2011 12:59 pm
For integer n, f(n) denotes the remainder when n is
divided by integer k. Is k greater than 10?
1). f(k+32)=8
2). f(k+42)=6
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Source: — Data Sufficiency |
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by sumgb » Fri Aug 12, 2011 2:37 pm
answer should be A.
1. f(k+32) = 8 means (k+32) is divided by k and remainder is 8, hence k could be 12. since 12 is the least possible value that yields remainder 8, k > 10 => suff.
cross off B,C,E

2. same principle but here k could be 9 or 12 which means k < 10 or k > 12. so insuff. cross off D

Answer A
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