CAT Quantitative Ability Questions | CAT Number System questions
CAT/1997
Question . 149
If m and n are integers divisible by 5, which of the following is not necessarily true?
A : m – n is divisible by 5B : m² – n² is divisible by 25C : m + n is divisible by 10D : None of these
View Answer Explanatory Answer
Method of solving this CAT Quantitative Ability Question from Number System question
(c) If m & n are integers divisible by 5.
Then, (m + n) might be or might not be divisible by 10.
For example: If m = 5 and n = 10
then m + n = 15 which is not divisible by 10.
But if m = 5, n = 25 then m + n = 30
which is divisible by 10.