GMAT Quantitative Reasoning Practice Test 1

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Question : 53 of 100

Marks: +1, -0

Which of the following has the smallest numerical value?

$2^3 × 2^2$
$2^6$
$2^5 × 2^1$
$(2^2) ^3$
$2^3 × 3^3$

Solution:

Using the rules for exponents, choice

2^3 × 2^2

simplifies to

2^5

and choices

2^6, 2^5 × 2^1, (2^2) ^3

simplify to

2^6=64

. Choice

2^3 × 3^3

becomes

27 × 81

, which is obviously much larger than 64 .

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