SOLUTION: which number comes next 154 77 81 78 39 43 40

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Question 771521: which number comes next
154 77 81 78 39 43 40
Answer by ramkikk66(644) About Me  (Show Source):
You can put this solution on YOUR website!
154 77 81 78 39 43 40
The next numbers are 20, 24, 21
Starting from 154, the series is defined by operations of
a) divide by 2
b) add 4
c) subtract 3
repeatedly.