mdavidm_531 wrote:If a and b are positive integers such that a/b = 2.86, which of the following must be a divisor of a?
(A) 10
(B) 13
(C) 18
(D) 26
(E) 50
I am not convinced with MGMAT explanation for this one. Will appreciate any sort of help.
Best,
Dave
a/b = 2.86 = 286/100 = 143/50.
143/50 cannot be reduced any further.
Thus, the smallest possible integer values that will yield a quotient of 2.86 are a=143 and b=50.
Since 143 = 11*13, both 11 and 13 must be divisors of a.
The correct answer is
B.
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