What is the next number? 3, 9, 33, 129. - ProProfs Discuss
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What is the next number? 3, 9, 33, 129.



This question is part of Impossible Test (The Real Worlds Hardest)
Asked by Realworldshardest, Last updated: Nov 24, 2020

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3 Answers

AKS

AKS

AKS
AKS

Answered Nov 06, 2017

ANSWER= 513.

3,9,33,129,?

9=33+(3-3)

33=93+(9-3)

129=333+(33-3)

Thus, ?=1293+(129-3)=487+126=513...

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John Adney

John Adney

John Adney
John Adney

Answered Nov 06, 2017

ANSWER= 513.

3,9,33,129,?

9=33+(3-3)

33=93+(9-3)

129=333+(33-3)

Thus, ?=1293+(129-3)=487+126=513...

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John Smith

John Smith

John Smith
John Smith

Answered Nov 06, 2016

513

N times 4-3
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