Multiple choice

In the following number series find the wrong term. 2, 3, 6, 15, 45, 156.5, 630

  1. 2

  2. 6

  3. 630

  4. 156.5

  5. 15
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is: term × 1 + 0 = 2, term × 2 + 0 = 6, term × 3 - 3 = 15, term × 4 + 0 = 60, term × 5 + 0 = 300, term × 6 + 0 = 1800. Checking: 2×1+0=2, 2×2+0=6 (not 3), so 3 is wrong. But let's verify: 2×1.5=3, 3×2=6, 6×2.5=15, 15×3=45, 45×3.5=157.5≈156.5, 157.5×4=630. The multiplier increases by 0.5 each time starting from 1.5. At position 5, we should get 45×3.5=157.5, not 156.5. So 156.5 is the wrong term.

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