Q557
If m and n are integers divisible by 5, which of the following is not necessarily true ?
A.
m + n is divisible by 10
AnswerB.
m - n is divisible by 5
C.
m2 - n2 is divisible by 25
D.
None of these
Answer: Option A
Solution
Answer: Option A
Solution:
Take m = 15 and n = 20Then, each one of m and n is divisible by 5
But (m + n) is not divisible by 10
Hence, (m + n) is divisible by 10 is not true.