Advanced Math practice question

Answer: 6

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

Common wrong answers

If you answered 5

5 gives 25 − 5 = 20.

If you answered 30

30 is the difference, not the number.

If you answered -5

−5 is the other root, which is not positive.

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