SOLUTION: which number comes next 15,18,54,57,171

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Question 771507: which number comes next
15,18,54,57,171
Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!
which number comes next
15,18,54,57,171
Ans:
Next number is 174, followed by 522
The series is built by doing successive operations of
a) add 3
b) multiply by 3
starting from the 1st number.
Hope you got it :)