Advanced Math practice question

Answer: 5

5^(x + 1) = 5³ gives x = 2, so 5^(x − 1) = 5¹ = 5. (Or divide by 5² = 25: 125 ÷ 25 = 5.)

Common wrong answers

If you answered 2

2 is x, not 5^(x − 1).

If you answered 25

25 is 5ˣ, one step short.

If you answered 123

123 subtracts 2 from 125, treating the exponent shift as a subtraction.

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