-
godemol
- Junior | Next Rank: 30 Posts
- Posts: 18
- Joined: Sat Jun 20, 2009 6:06 pm
- Thanked: 1 times
- GMAT Score:720
What is the remainder when the positive integer n is divided by 2?
(1) When n is divided by 5, the remainder is an odd integer.
(2) When n is divided by 10, the remainder is an odd integer.
Thanks.
from
(1) I find that remainders are odd when n=6, 8.... That is, when 6/5 remainder is 1 and 8/5, remainder is 3. Here, because these number are multiples of 2, remainder is 0 when they're divided by 2. Therefore, Sufficient.
from
(2) I find that remainders are odd when n=11, 13.... That is, when 11/10, remainder is 1 and 13/10, remainder is 3. Here, because these numbers give remainder of 1 when divided by 1, this is also sufficient.
So, i chose D.... But, the correct answer is B. What am I doing wrong?
(1) When n is divided by 5, the remainder is an odd integer.
(2) When n is divided by 10, the remainder is an odd integer.
Thanks.
from
(1) I find that remainders are odd when n=6, 8.... That is, when 6/5 remainder is 1 and 8/5, remainder is 3. Here, because these number are multiples of 2, remainder is 0 when they're divided by 2. Therefore, Sufficient.
from
(2) I find that remainders are odd when n=11, 13.... That is, when 11/10, remainder is 1 and 13/10, remainder is 3. Here, because these numbers give remainder of 1 when divided by 1, this is also sufficient.
So, i chose D.... But, the correct answer is B. What am I doing wrong?
