Multiple choice

In the following number sequence, one number is wrong. Find the wrong number. 144, 215, 540, 1890, 8505, 46777.5

  1. 215

  2. 540

  3. 1890

  4. 8505

  5. 46777.5
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A Correct answer
Explanation

The pattern is multiplying by 1.5, 2.5, 3.5, 4.5, 5.5. 144 * 1.5 = 216 (not 215). 216 * 2.5 = 540. The wrong number is 215.

AI explanation

The series is formed by multiplying the previous term by an increasing decimal fraction. The correct progression from 144 should be 144 multiplied by 1.5 equals 216. The given term 215 is incorrect and should be 216. The subsequent terms correctly follow the multiplication pattern from the erroneous 215, making 215 the wrong number in the original sequence.

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