Choose the missing terms out of the given alternatives : C4X, F9U, I16R, ?

6, 13, 25, 51, 101, ?

3, 4, 7, 7, 13, 13, 21, 22, 31, 34, ?

Choose the missing terms out of the given alternatives : A, I, P, V, A, E, ?

120, 99, 80, 63, 48, ?

5824, 5242, ?, 4247, 3823

Choose the missing terms out of the given alternatives : ajs , gpy , ? , sbk , yhq

Choose the missing terms out of the given alternatives : Z, Y, X, U, T, S, P, O, N, K, ?, ?

One term in the number series is wrong. Find out the wrong term.<br> 2, 3, 4, 4, 6, 8, 9, 12, 16