What should come in place of the question mark (?) in the given series? 6, 10, 18, 30, 46, ?
66
Look at the differences between consecutive terms: 10 − 6 = 4, 18 − 10 = 8, 30 − 18 = 12, 46 − 30 = 16.
The differences themselves increase by 4 each time: 4, 8, 12, 16, so the next difference is 16 + 4 = 20.
Add this to the last term: 46 + 20 = 66.
Hence, the number that should come in place of the question mark is 66.
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Important Questions from Series
Choose the option which completes the given figure series.
Select the correct option that will fill in the blank and complete the series.
18, 36, 108, 432, 2160, .............Select the correct option that will fill in the blank and complete the series.
52, 56, 65, 81, 106, ?Select the correct option that will fill in the blank and complete the series. 21, 43, 85, 171, 341, .......
Select the correct option that will fill in the blank and complete the series.
3, 5, 7, 9, 11, ?
2, 2, 2, 2, 2, ?
