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Re: The remainder when m is divided by 5 is 2, and the remainder when m is
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14 Sep 2022, 06:04
Given that The remainder when m is divided by 5 is 2, and the remainder when m is divided by 3 is 2 and m > 2 and we need to find the least possible value of m
Let's solve the problem with two methods:
Method 1: Substitution
Let's take each option choice and see which one satisfies the question
(A) 5
=> 5 when divided by 5 gives 0 remainder. But we needed 2 as remainder => NOT POSSIBLE
(B) 7
=> 7 when divided by 5 gives 2 remainder. => TRUE => 7 when divided by 3 gives 1 remainder. But we needed 2 as remainder => NOT POSSIBLE
(C) 15
=> 15 when divided by 5 gives 0 remainder. But we needed 2 as remainder => NOT POSSIBLE
(D) 17
=> 17 when divided by 5 gives 2 remainder. => TRUE => 17 when divided by 3 gives 2 remainder. POSSIBLE In Test, we don't need to solve further, but I am solving to complete the solution
(E) 27
=> 27 when divided by 5 gives 2 remainder. => TRUE => 27 when divided by 3 gives 0 remainder. But we needed 2 as remainder => NOT POSSIBLE
So, Answer will be D
Method 2: Algebra
The remainder when m is divided by 5 is 2
Theory: Dividend = Divisor*Quotient + Remainder
m -> Dividend 5 -> Divisor a -> Quotient (Assume) 2 -> Remainders => m = 5*a + 2 = 5a + 2 ...(1)
The remainder when m is divided by 3 is 2
=> Let quotient be b => m = 3b + 2 ..(2)
From 1 and 2 we get that when divided by 5 and 3 gives 2 as remainder => m = a multiple of LCM(5,3) + 2 => m = 15c + 2 (where c is an integer)
Option choice 17 satisfies this condition as 17 = 15 + 2
So, Answer will be D Hope it helps!
Watch the following video to learn the Basics of Remainders
gmatclubot
Re: The remainder when m is divided by 5 is 2, and the remainder when m is [#permalink]