-
ashish2104
- Master | Next Rank: 500 Posts
- Posts: 191
- Joined: Sat Jun 26, 2010 9:27 am
- Thanked: 6 times
- Followed by:2 members
If n is a positive integer is n^3-n divisible by 4?
1) n = 2k+1, where k is an integer
2) n^2+nis divisible by 6
[spoiler]OA:A --- Source: OG DS Q.170 [/spoiler]
[spoiler] My question here is, using 1) n= 1,3,5,7....all odd integers. But when n=1, n^3-n is 0. I read on wiki that 0 is not divisible by 4. For that matter 0 is not disivisble by any integer as the answer will always be 0. Can someone please confirm this? [/spoiler]
1) n = 2k+1, where k is an integer
2) n^2+nis divisible by 6
[spoiler]OA:A --- Source: OG DS Q.170 [/spoiler]
[spoiler] My question here is, using 1) n= 1,3,5,7....all odd integers. But when n=1, n^3-n is 0. I read on wiki that 0 is not divisible by 4. For that matter 0 is not disivisble by any integer as the answer will always be 0. Can someone please confirm this? [/spoiler]
