Advanced Math practice question

Answer: 18

n² = 9 first, then 2 × 9 = 18.

Common wrong answers

If you answered 6

6 is 2n, without squaring.

If you answered 12

12 is 2 × 3 × 2, doubling instead of squaring.

If you answered 36

36 squares 2n = 6 instead of squaring n alone.

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