Multiple choice

The wrong (misfit) number of the sequence 36, 81, 144, 225, 256, 441 is-

  1. $36$
  2. $81$
  3. $225$
  4. $256$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All numbers are perfect squares: 36=6², 81=9², 144=12², 225=15², 441=21². However 256=16², which doesn't fit the pattern. The other squares follow a pattern: 6, 9, 12, 15 (adding 3 each time), then jumping to 21. The consistent pattern would give 18²=324, not 256.

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