Multiple choice

In each question below, a number series is given in which one number is wrong. Find out the wrong number $6 \quad 7 \quad 16 \quad 41 \quad 90 \quad 154 \quad 292$

  1. 7

  2. 16

  3. 41

  4. 90

  5. 154
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E Correct answer
Explanation

The pattern is: +1, +9, +25, +49, +81, +121... which are squares of odd numbers (1², 3², 5², 7², 9², 11²). Checking: 6+1=7, 7+9=16, 16+25=41, 41+49=90, 90+81=171 (not 154), 171+121=292. So 154 should be 171. The difference between consecutive terms follows odd squares.

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