Civil Service Exam Reviewer · Logical Reasoning · hard
If 8 ★ 3 = 1124, 9 ★ 4 = 1336, then 7 ★ 3 = ?
- 104
- 2110
- 1021
- 421
Answer
C. 1021
Solution
The rule is a ★ b = (a + b) followed by (a × b). Check: 8 ★ 3 → 1124; 9 ★ 4 → 1336. So 7 ★ 3 = 1021.
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