Multiple choice general knowledge math & puzzles

Find the odd man out: 835, 734, 642, 751, 853, 981, 532

  1. 751

  2. 853

  3. 981

  4. 532
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pattern is first digit × second digit: 8×3=24≠5 (sum=16), 7×3=21≠4 (sum=14), 6×4=24=24 ✓, 7×5=35≠1, 8×5=40≠3, 9×8=72≠1, 5×3=15≠2. Actually all except 642 have sum of digits=16,17,18,19,14,10. Multiple valid patterns exist.

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