In the series 10, 17, 24, 31, 38,...... which of the following will be a number of the series ?

U32, V29, __, X23, Y20. What number should fill the blank?

Find the missing term: 5, 2, 7, 9, 16, 25, ?

Find the missing number: 3, 7, 15 ,?, 63 ,127

Find the missing term: 4 ,7, 12, 19, 28, ?

17, 17, 34, 20, 20, 31, 23, ... choose which pair of numbers comes next?

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

V, VIII, XI, XIV, __, XX. What number should fill the blank?

Find out the wrong term: 2, 5, 10, 50, 500, 5000