Multiple choice

Find out the wrong number in the following series. 8450, 8793, 9009, 9135, 9198

  1. 8450

  2. 8793

  3. 9009

  4. 9135

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The differences between consecutive terms are: 8793-8450=343=7³, 9009-8793=216=6³, 9135-9009=126, 9198-9135=63. The pattern of differences should be 7³, 6³, 5³=125, 4³=64. The difference 126 breaks the pattern (should be 125), making 9135 the wrong number. If 9009+125=9134, then 9134+64=9198, which fits.