Multiple choice general knowledge math & puzzles find the odd man out1, 4, 9, 16, 20, 36, 49 20 1 49 9 Reveal answer Fill a bubble to check yourself A Correct answer Explanation All numbers in the set except 20 are perfect squares: 1 (1^2), 4 (2^2), 9 (3^2), 16 (4^2), 36 (6^2), and 49 (7^2). 20 does not fit this mathematical pattern.