Multiple choice

In the following number series only one number is wrong. Find out the wrong number. 66, 246, 1140, 5615, 27990

  1. 66

  2. 5615

  3. 1140

  4. 246

  5. 27990
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern involves multiplying by 4-5, then adding 30, then multiplying by 5, then subtracting 5 alternately: 66 × 4 = 264, 264 - 18 = 246. This breaks the expected pattern. Continuing: 246 × 5 = 1230, 1230 - 90 = 1140. Then 1140 × 5 = 5700, 5700 - 85 = 5615. Then 5615 × 5 = 28075, 28075 - 85 = 27990. The number 246 doesn't fit.

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