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Complete the series.......3,14,39,155,399, __ ?

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Complete the series.......3,14,39,155,399, __ ?
posted Mar 4, 2015 by Jaspalsingh Parmar

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1 Answer

0 votes

alternate numbers...
3*10+9=39 39*10+9=399
14*10+15=155 155*10+15=1565(ans)

answer Mar 10, 2015 by Prakash Mahato
sorry but its not correct
...