Multiple choice general knowledge math & puzzles 1, 4, 9, 16, 20, 36, 49 1 9 20 49 Reveal answer Fill a bubble to check yourself C Correct answer Explanation This sequence consists primarily of perfect squares: 1 (1²), 4 (2²), 9 (3²), 16 (4²), 36 (6²), and 49 (7²). The number 20 is the only non-square number, standing out as the exception to the square number pattern.