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What is the square root of 64?

  1. 8

  2. 12

  3. 4

  4. 16

The correct answer is: 8

The square root of a number is the number that, when multiplied by itself, gives the original number. In this case, 8 multiplied by itself is indeed equal to 64, making A the correct choice. B and C are incorrect choices because 12 multiplied by itself is 144 and 4 multiplied by itself is 16, neither of which is equal to 64. D is also an incorrect choice because 16 multiplied by itself is 256.