GMAT Question of the Day (Nov 22): Arithmetic and Sentence Correction

Math (DS)

If and are positive integers, is divisible by 15?

1. is a multiple of 25, and is a multiple of 20
2.

OA and Explanation

Verbal (SC)

The supply of oil being finite has become an economical and political consideration of the first magnitude for all modern industrial nations.

(A) The supply of oil being finite has become an economical
(B) The finite supply of oil has become an economical
(C) That the supply of oil is finite has become an economical
(D) The supply of oil being finite has become an economic
(E) That the supply of oil is finite has become an economic

OA and Explanation

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