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odd/even - easy?

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by kamu » Tue Mar 10, 2009 12:03 pm
An odd number added to itself an odd number of times yields

(A) an odd number
(B) an even number
(C) a prime number
(D) a positive number
(E) a perfect square

OA : A
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Re: odd/even - easy?

by ufdan » Tue Mar 10, 2009 12:13 pm
kamu wrote:An odd number added to itself an odd number of times yields

(A) an odd number
(B) an even number
(C) a prime number
(D) a positive number
(E) a perfect square

OA : A
Very easy

1+1+1= 3
3+3+3+3+3= 15

Always an odd number.

Also remember, the product of two odd numbers is always an odd number...3x3=9 5x5=25.
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by kamu » Tue Mar 10, 2009 12:18 pm
An odd number added to itself an odd number of times yields


I understood it as.

3 + 3(odd number of times)
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by ufdan » Tue Mar 10, 2009 12:31 pm
hmm... I see how that could be confusing. My first reaction was to solve it the way I did. Did that question come from Kaplan?
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by kamu » Wed Mar 11, 2009 3:02 am
I'm not sure. I'll let you know.
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