Civil Service Exam Reviewer · Logical Reasoning · medium
If 8 ★ 2 = 60, 8 ★ 3 = 55, then 5 ★ 3 = ?
- 16
- 34
- 64
- 23
Answer
A. 16
Solution
The rule is a ★ b = a² − b². Check: 8 ★ 2 → 60; 8 ★ 3 → 55. So 5 ★ 3 = 16.
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