Advanced Math practice question

Answer: 3

With length L, the diagonal is √(L² + 16) = L + 2. Squaring: L² + 16 = L² + 4L + 4, so 4L = 12 and L = 3.

Common wrong answers

If you answered 2

2 is the difference between the diagonal and the length.

If you answered 5

5 is the diagonal, not the length.

If you answered 6

6 comes from 4L = 24, forgetting to subtract the 4.

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