Multiple choice

In the following number series, a term is wrong, find the wrong term.\n\n1 \quad 2.5 \quad 2.5 \quad 6.25 \quad 15.625 \quad 19.62625

  1. 2.5

  2. 6.25

  3. 15.625

  4. 1

  5. 19.62625
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E Correct answer
Explanation

The pattern appears to be: multiply by 2.5, then add or subtract a calculated value. Starting from 1: 1 x 2.5 = 2.5 (correct). For 2.5: 2.5 x 2.5 = 6.25, but the next term should be 6.25 + 6.25/2.5 - some adjustment. The pattern isn't perfectly clear, but 19.62625 doesn't fit the progression from 15.625.

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