Multiple choice

Find the wrong number in the following number series. 3, 4, 10, 32, 136, 685

  1. 3

  2. 10

  3. 4

  4. 32

  5. 685
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pattern: nth term = previous term × n + n. 3×1+1=4, 4×2+2=10, 10×3+3=33, but the given is 32. Continuing: 33×4+4=136, 136×5+5=685. The number 32 breaks the pattern - it should be 33. The last term 685 is correct based on the rule.

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