Advanced Math practice question

Answer: 5

n² + n − 30 = (n + 6)(n − 5) = 0, so n = 5.

Common wrong answers

If you answered 6

6 gives 36 + 6 = 42.

If you answered 15

15 halves 30.

If you answered -6

−6 is the other root, which is not positive.

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