Multiple choice

In the following number series only one number is wrong. Find out the wrong number. 19 18 32 87 333 1635

  1. 19

  2. 32

  3. 1635

  4. 18

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

The pattern is: ×1 - 1, ×2 - 4, ×3 - 9, ×4 - 16, ×5 - 25. Starting from 19: 19×1-1=18, 18×2-4=32, 32×3-9=87, 87×4-16=332 (not 333), 332×5-25=1635. So 333 is the wrong number, which would make the answer 'None of these' since 333 isn't listed as an option choice.

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