Instructions

What will come in place of the question mark (?) in the following number series ?

Question 1

5, 12.5, 32.5, 105, 427.5, ?

Solution

The pattern here followed is :

5 * 1 + 7.5 = 12.5

12.5 * 2 + 7.5 = 32.5

32.5 * 3 + 7.5 = 105

105 * 4 + 7.5 = 427.5

427.5 * 5 + 7.5 = 2145

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