Complete the given series by finding the missing term.
1, 6, 15, ?, 45, 66, 91
2, 5, 9, 19, 37, ?
4, 8, 28, 80, 244, ?
10000, 11000, 9900, 10890, 9801
1, 4, 27, 16, ?, 36, 343
3, 20, 63, 144, 275, ?
1, 9, 25, 49, ?, 121
4, 7, 12, 19, 28, ?
2, 9, 28, ?, 126, 217, 344
In the following number series, two terms have been put within brackets.
4, 6, 10, (12), 16, (14), 22
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