Multiple choice general knowledge math & puzzles find the odd man out 396, 462, 572, 396, 427, 671, 264 396 671 264 427 Reveal answer Fill a bubble to check yourself D Correct answer Explanation In all numbers except 427, the sum of the first and third digits equals the middle digit (e.g., 3+6=9, 4+2=6, 5+2=7). For 427, 4+7=11, which does not equal 2.