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even odd

by GmatKiss » Tue Aug 09, 2011 1:16 pm
If a and b are positive integers, is a + 4b odd?

1) b is even.

2) a is odd.
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Source: — Data Sufficiency |
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by Gurpinder » Tue Aug 09, 2011 1:32 pm
GmatKiss wrote:If a and b are positive integers, is a + 4b odd?

1) b is even.

2) a is odd.
For a+4b to be odd, A must be odd.

(1) Insuff.
(2) Suff.

(B)
"Do not confuse motion and progress. A rocking horse keeps moving but does not make any progress."
- Alfred A. Montapert, Philosopher.
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