ASVAB · Exponents and Roots

What is √144?

Reviewed by Jordan Morley, Editorial Lead at 247SimpleTests. Written by the 247SimpleTests Editorial Team from the official source material cited on every question.

Correct answer

A 72
B 12
C 24
D 14

Why this is the answer

The square root of 144 is the number that, multiplied by itself, gives 144. Since 12 × 12 = 144, √144 = 12. Memorizing perfect squares up to at least 15² (1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225) makes these instant. The distractor 72 is 144 ÷ 2, a common error of halving instead of taking the root. The square root of 144 is 12.

Source: ASVAB MK, Square Roots

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About this topic: Exponents and Roots

Exponents and roots questions cover the laws of exponents (adding when multiplying, multiplying when raising a power to a power), negative and zero exponents, scientific notation, and simplifying square roots. This is one of 10 Mathematics Knowledge questions on exponents and roots, each with a full explanation on a single study page.

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What is √144?

Why this is the answer

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About this topic: Exponents and Roots

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