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ASVAB · Exponents and Roots

What is √144?

Correct answer

12

  1. A 12
  2. B 14
  3. C 72
  4. D 24

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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