Sequence And Series Question 334

Question: The difference between an integer and its cube is divisible by

[MP PET 1999]

Options:

A) 4

B) 6

C) 9

D) None of these

Show Answer

Answer:

Correct Answer: B

Solution:

It can easily proved by putting $ n=2,\ 3,\ 4…….. $ . The difference between an integar and its cube is divisible by 6.