Multiple choice

Find the wrong number in the following number series: $5, 366, 655, 881, 1049, 1170$

  1. $881$
  2. $655$
  3. $1170$
  4. $5$

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Check the pattern: 5 + 19² = 5 + 361 = 366. 366 + 17² = 366 + 289 = 655. 655 + 15² = 655 + 225 = 880 (not 881). 880 + 13² = 880 + 169 = 1049. 1049 + 11² = 1049 + 121 = 1170. The pattern is adding consecutive odd squares starting from 19². The term 881 breaks this pattern - it should be 880.

Keep practicing — related questions