Number and Letter series questions and answers for competitive exams

Direction: Which one set of letters when sequentially placed at the gaps in the given letters series shall complete . _aa_ba_bb_ab_aab

2/3, 4/7, 7/13, 11/21, ?

1, 9, 25, ?, 81

1, 3, 7, 13, 21, 31, 43, ?

Direction: In each of the following questions, a series is given, with one/two terms missing. Choose the correct alternatives from the given ones that will complete the series. 6,8 : : 2, 12 : : 5, 9 : : 4, ?_

14, 21, 30,41,54, ?

AZBY, CXDW, EVFU, ?

264, 396, 473, 583, ?

15, 23, 31, 39, ?, 54, 61

A, Z, B, Y, C, X, ?, ?

365, 364, 355, 330, 281, ?

Direction: Which one set of letters when sequentially placed at the gaps in the given letters series shall complete . m_ _ I m I _ m m_ l

Direction: Which one set of letters when sequentially placed at the gaps in the given letters series shall complete . bb_aab_caab_ca_

Direction: Which one set of letters when sequentially placed at the gaps in the given letters series shall complete . -wi -- w-nt -in- wi-

121, ?, 169, 196,225