GRE Sample Test 4 Quantitative Reasoning 1

Picking Numbers is the best strategy, since there are variables in the question and the answer choices. If c = 3, then 2c = 6. There are two integers between 3 and 6, so plug c = 3 into the answer choices to see which one is equal to 2.
A) 3/2 ≠ 2
B) 3 ≠ 2
C) 3 - 1 = 2
D) 3 - 2 ≠ 2
E) 3 + 1 ≠ 2
The only answer choice that equals 2 when c = 3 is (C), so (C) is correct.