What is the next number of the following sequence ?
21, 77, 165, 285, ......
The series follow the rule,
21 = 77 = 92-4165 = 132-4285 = 172-4
5,9,13,17,21,(+4)...In the same way next no. will be 212-4 = 441 - 4 = 437
In the following question, select the missing number from the given series.
25, 33, 42, 52, 63, ?
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4, 5, 12, 39, 160, ?
44, 40, 36, ?, 28, 24
18, 37, 76, 155, 314, ?
113, 116, 119, 122, 125, ?
15, 7.5, 7.5, ?, 22.5, 56.25
2, 5, 9, 14, 20, ?
9, 16, 13, 12, 17, 8, ?, ?