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What is the remainder when the positive integer n is divided [#permalink]
 25 Feb 2011, 07:20
Question Stats:
30% (02:31) correct
70% (00:46) wrong based on 10 sessions
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
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Re: please explain the answer how the authore arrives to that [#permalink]
25 Feb 2011, 07:40
naaga wrote: 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 What is the remainder when the positive integer n is divided by 2? Question basically asks whether n is odd or even: if it's odd then the remainder will be 1 and if it's even then the remainder will be zero. (1) When n is divided by 5, the remainder is an odd integer --> n=5q+odd, so n could be odd (1, 3, 11, 13, 21, 23, ...) as well as even (6, 8, 16, 18, ... ). Not sufficient. (2) When n is divided by 10, the remainder is an odd integer --> n=10p+odd=even+odd=odd. Sufficient. Answer: B. P. S. naaga please always tag your questions.
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Re: please explain the answer how the authore arrives to that [#permalink]
25 Feb 2011, 11:15
Answer should be B. If divided by 10 ,and the remainder is odd, then remainder will always be 1 when divided by 2
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Re: please explain the answer how the authore arrives to that [#permalink]
25 Feb 2011, 11:23
Clear B. 2) tells me precisely that n is odd. Hence reminder is 1 when n is divided by 2.
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Re: please explain the answer how the authore arrives to that [#permalink]
30 Apr 2011, 18:35
answer is b 1. in suff no will be like 6,8,11,13 2. suff - no will be always odd-11,13 15 , 17 so b is the answer
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Re: please explain the answer how the authore arrives to that [#permalink]
30 Apr 2011, 20:03
Clear B, as 10 is a multiple of 2.Since the remainder is an odd number meaning it is always 1.
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Re: please explain the answer how the authore arrives to that [#permalink]
30 Apr 2011, 20:59
1. Not sufficient
n could be even or odd
2. Sufficient
n is even +odd => n is odd
Answer is B.
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Re: please explain the answer how the authore arrives to that
[#permalink]
30 Apr 2011, 20:59
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