Question 7
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P, Q and R are three consecutive odd numbers. The sum of their squares is 371.
What is R?
- A 11
- B 15
- C 9
- D 13 Correct
Correct Answer: Option D
Let Q = n: (n − 2)² + n² + (n + 2)² = 3n² + 8 = 371
n² = 121 → n = 11
R = 13 (the numbers are 9, 11, 13)
Trap: 11 is the middle number.
Answer: 13
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