Multiple choice

Directions: Complete the series.

1, 10, 36, 129, 540, ?

  1. 2725

  2. 549

  3. 566

  4. 5400

  5. 2720
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A Correct answer
Explanation

As it is clear from the given series, every term is first added to a natural number and then, the result is multiplied as follows:

(1 + 9) * 1 = 10  (10 + 8) * 2 = 36 (36 + 7) * 3 = 129 (129 + 6) * 4 = 540 Similarly, (540 + 5) * 5 = 2725

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