Question 48
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A two-digit number whose digits add up to 9 is 18 less than the square of that digit sum. What is the number?
- A 54
- B 63 Correct
- C 72
- D 81
Correct Answer: Option B
Square of the digit sum = 9² = 81
Number = 81 − 18 = 63
Check: 6 + 3 = 9 ✔
Answer: 63
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