What will come in place of the question mark (?) in the given number series?
7, 13, 31, 85, 247, ?
Each number is multiplied by 3 and then 8 is subtracted from it.
7 $$\times 3 - 8$$ = 13
13 $$\times 3 - 8$$ = 31
31 $$\times 3 - 8$$ = 85
85 $$\times 3 - 8$$ = 247
247 $$\times 3 - 8$$ = 733
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