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Find the missing number- 17; 31; 65; 127; 257; ?

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Find the missing number- 17; 31; 65; 127; 257; ?
posted Dec 2, 2019 by Rajni

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1 Answer

0 votes

511

17
17*2-3
31*2+3
65*2-3
127*2+3
257*2-3=511

answer Dec 2, 2019 by Hanifa Mammadov



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