Question 141

What should come in place of the question mark (?) in the following number series?
1 4 14 45 139 422 ?

Solution

The pattern here followed is :

1 * 3 + 1 = 4

4 * 3 + 2 = 14

14 * 3 + 3 = 45

45 * 3 + 4 = 139

139 * 3 + 5 = 422

422 * 3 + 6 = 1272

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