16Hit1600
Advanced MathEasy–MediumPositive number from a square minus one

Advanced Math practice question

The square of a positive number, decreased by 1, equals 8. What is the number?

Answer: 3

n² = 9, so n = 3.

Common wrong answers

If you answered 9
9 is n².
If you answered 4.5
4.5 halves 9.
If you answered 2.65
2.65 is √7, subtracting 1 from 8 instead of adding.

More Advanced Math questions

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