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by shashank.ism » Mon Feb 15, 2010 11:18 pm
Is x divisible by 70?
(A) x is divisible by 2 and 5.
(B) x is divisible by 2 and 7.
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by papgust » Mon Feb 15, 2010 11:42 pm
A. x may or may not be divisible by 70. Insufficient.
B. Again, x may or may not be divisible by 70. Insufficient.

Combined,
Factors that divide x definitely are 2,5,7 (70). So, x is divisible by 70. Sufficient.

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