Question 48
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The sum of a number and its square root is 72. What is the number?
- A 49
- B 64 Correct
- C 81
- D 8
Correct Answer: Option B
Let √x = t: t² + t = 72
t² + t − 72 = 0 → (t + 9)(t − 8) = 0
t = 8 → x = 64
Answer: 64
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