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What is the next number of the following sequence: 2, 6, 15, 28, 55, ?

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What is the next number of the following sequence: 2, 6, 15, 28, 55, ?
posted Jan 2, 2017 by anonymous

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1 Answer

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1*2=2
2*3=6
3*5=15
4*7=28
5*11=55
6*13=78
Ans: 78

answer Jan 3, 2017 by Anhthu Cao
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