Select the number that will come next in the following series.
1, 5, 9, 17, 25, 37, 49, 65, 81, .........
1-5=4
5-9=4
9-17=8
17-25=8
25-37=12
37-49=12
49-65=16
65-81=16
Hence,81+20= 101.
1, 5, 9, 17, 25, 37, 49, 65, 81,101...
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