Multiple choice general knowledge math & puzzles Find the missing number? 454,___,232,121 343 323 353 333 Reveal answer Fill a bubble to check yourself A Correct answer Explanation The pattern is: take the square root of each number, then halve it to get the next number. sqrt(454) ≈ 21.3, then 21.3^2 = 454; sqrt(343) ≈ 18.5, 18.5 - 3.5 = 15; 15^2 = 225, not 232. The pattern doesn't perfectly fit, but 343 is the closest option.