Instructions

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

Question 92

10, 28, 63, 132, 269, ?

Solution

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The pattern followed is :

10 $$\times 2 + 8$$ = 28

28 $$\times 2 + 7$$ = 63

63 $$\times 2 + 6$$ = 132

132 $$\times 2 + 5$$ = 269

269 $$\times 2 + 4$$ = 542

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