Instructions
What will come in place of the question mark (?) in the following number series ?
Solution
The pattern followed is :
6 $$\times 2 - 1$$ = 11
11 $$\times 3 - 2$$ = 31
31 $$\times 4 - 3$$ = 121
121 $$\times 5 - 4$$ = 601
601 $$\times 6 - 5$$ = 3601
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