Multiple choice

Find a wrong number in the series: 8, 13, 21, 32, 47, 63, 83

  1. 13

  2. 21

  3. 32

  4. 47

  5. 83
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The differences are: 13-8=5, 21-13=8, 32-21=11, 47-32=15, 63-47=16, 83-63=20. The pattern of differences is 5, 8, 11, 14, 17, 20. 47 is incorrect because 32+14=46, and 46+17=63.

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