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What should come in place of the question mark '?' in the following number series? 15, 28, 81, 320, ?

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What should come in place of the question mark '?' in the following number series?

15, 28, 81, 320, ?


1. 1500
2. 1600
3. 1595
4. 1590
5. 1560
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Correct Answer - Option 3 : 1595

Calculation:

⇒ 15 × 2 – 2 = 28

⇒ 28 × 3 – 3 = 81

⇒ 81 × 4 – 4 = 320

⇒ 320 × 5 – 5 = 1595

∴ ? = 1595

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