Multiple choice general knowledge math & puzzles

Let A = (the square root of 8). Which of the following equals the square of A?

  1. 2 * (the square root of 2)

  2. 8

  3. 4 * (the square root of 2)

  4. 8 * (the square root of 2)
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B Correct answer
Explanation

If A = √8, then A^2 = (√8)^2 = 8. This is a fundamental property of square roots: squaring a square root returns the original number (for non-negative numbers). The square of √8 cannot involve √2 because it cancels out completely.

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