Algebra & Equations · Question 23 · Medium
A positive number exceeds its positive square root by 30. What is the number?
- 64
- 36
- 49
- 25
Answer and explanation
Answer: B. 36
Explanation: Let √n = t: t² − t − 30 = 0, so (t − 6)(t + 5) = 0 and t = 6 (t must be positive). n = 36.
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