Discussion
Find the odd man out. 835, 734, 642, 751, 853, 981, 532
Answer: A
In each number, the middle digit is the difference of the outer two.
- 835: \( 8 - 5 = 3 \) ✓
- 734: \( 7 - 4 = 3 \) ✓
- 642: \( 6 - 2 = 4 \) ✓
- 853: \( 8 - 3 = 5 \) ✓
- 981: \( 9 - 1 = 8 \) ✓
- 532: \( 5 - 2 = 3 \) ✓
- 751: \( 7 - 1 = 6 \neq 5 \) ✗
So 751 is the odd one out.
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