Instructions

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

Question 2

20, 38, 74, 146, 290, ?

Solution

The pattern here followed is :

20 * 2 - 2 = 38

38 * 2 - 2 = 74

74 * 2 - 2 = 146

146 * 2 - 2 = 290

290 * 2 - 2 = 578

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