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

# 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: Mar 04, 2019

### Request Answer   Share    ... Answer AnonymouslyAnswer Later Copy Link #### AKS

AKS

3,9,33,129,?

9=33+(3-3)

33=93+(9-3)

129=333+(33-3)

Thus, ?=1293+(129-3)=487+126=513... 1  Reply #### AKS

AKS

Replied on Nov 06, 2017

ANSWER= 513. 3,9,33,129,? 9=3 multiplied by 3+(3-3) 33=(9 multiplied by 3)+(9-3) 129=(33 multiplied by 3)+(33-3) Thus, ?=129 (multiplied by 3)+(129-3)=487+126=513...   Reply 3,9,33,129,?

9=33+(3-3)

33=93+(9-3)

129=333+(33-3)

Thus, ?=1293+(129-3)=487+126=513...   Reply #### John Smith

John Smith  Answered on Nov 06, 2016

513

N times 4-3   Reply #### ephalent

Ephalent

I dont get it   Reply I dont get it   Reply Replied on Jun 12, 2017

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