Question

1 3 10 21 64 129 356 717 find odd number in this series

Answer 1

1,3,21,129,717 are all the odd numbers in this series.......
hope it will help u......
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Answer 2

I think 356 and 717 should be replaced by 388 and 777
coz 1×2+1=3,. 3×3+1=10, 10×2+1=21, 21×3+1, 64×2+1, 129 ×3+ 1 =388 and 388×2+1=777
hope it was useful....
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