Advanced Math practice question

Answer: 7

n × 2n = 2n² = 98, so n² = 49 and n = 7.

Common wrong answers

If you answered 14

14 is twice the number, not the number itself.

If you answered 49

49 is n², not n.

If you answered 9.9

9.9 is √98, forgetting to divide by 2 first.

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