GMAT Question of the Day (Jun 9): Mixture Problem and Sentence Correction

Math (DS)

$X$ grams of water were added to 80 grams of a strong solution of acid. If as a result, the concentration of acid in the solution became $\frac{1}{Y}$ times of the initial concentration, what was the concentration of acid in the original solution?

1. $X = 80$
2. $Y = 2$

OA and Explanation

Verbal (SC)

New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.

(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than ever before
(C) have made it possible to study in greater detail than ever before the effects of calefaction, or warming, of a river
(D) make possible the study of the effects of calefaction, or warming, of a river in greater detail than it ever was before
(E) has made it more possible than ever before to study in greater detail the effects of calefaction, or warming, of a river

OA and Explanation

GMAT Question of the Day (Jun 9): Mixture Problem and Sentence Correction

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