Multiple choice

Find the wrong term in the following number series- –1 7 8 63 24 215

  1. –1

  2. 8

  3. 24

  4. 215

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

Starting from -1 doesn't work with the sequence. Try starting from 7: 7×1+1=8, 8×8-1=63, 63÷3-?=24... This doesn't yield a clear pattern. However, notice that if we remove -1, the pattern 7, 8, 63, 24, 215 has some relationship: 7+1=8, 8×8-1=63, 63÷3=21≈24, 24×9-1=215. The -1 doesn't fit any logical pattern starting the sequence, making it the wrong term. Option A is correct.

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