Which term of the series 5,10, 20, 40,...................is 1280 ?

8, 6, 9, 23, 87 , ... What number should come next?

16, 26, 56, 36, 46, 68, 56, ... choose which pair of numbers comes next?

Find out the wrong term: 380, 188, 92, 48, 20, 8, 2

1, 10, 7, 20, 13, 30, 19, ... choose which pair of numbers comes next?

20, 20, 17, 17, 14, 14, 11, ... choose which pair of numbers comes next?

Find the missing term: 3, 8, 13, 24, 41, ?

Find the missing term : 3, 5, 9, 17, ?

80, 10, 70, 15, 60, ... What number should come next?