Number and Letter series questions and answers for competitive exams

206, 221, 251, 296, 356, ?

A, CD, GHI, ? , UVWXYZ

ABDC, GHJI, MNPO, ?

113, 225, 449, ?, 1793

7, 9, 13, 21, 37, ?

1, 2, 7, ?, 23, 34, 47

4, 9, 19, 39, ?

BCD, DBC, EFG, ? , HIJ

Direction: Which one set of letters when sequentially placed at the gaps in the given letters series shall complete . p_ _pp q r p _ r

AZ, CX, FU, ?

C, E, I, K, O, Q, ?

Direction: In the following question, number of letters skipped in between adjacent letters of the series starting from behind increased by one. Which of the following observes the rule?

7, 16, 27, 40, 55, ?

2, 6, 12, 20, 30, 42, ?

2, 7, 17, 32, 52, 77, ?