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