Find the missing term of sequence.
AB, BA, ABC, CBA, ABCD, ____

. ____, 9, 25, 49, 121, 169

What number comes next in the series?
1, 2, 3, 5, 8, ___

Find the missing (?) in the series.
14, 28, 42, 56, ? , 84, 98

Find the missing (?) in the series.
NA, PC, RE, TG, ?, XK, ZM

In the following question, select the missing number from the given series.
2, 5, 12, 27, ?

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
M5D, O7G, Q10J, ?, U19P

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it ?
MN_O_NN_M_NO