Choose the missing terms out of the given alternatives : ejo tyd ins xch ?

Which term of the series 5, 10, 20, 40, ..... is 1280?

One term in the number series is wrong. Find out the wrong term.<br> 11, 5, 20, 12, 40, 26, 74, 54

Choose the missing terms out of the given alternatives : Z, W, S, P, L, I, E ?

Choose the missing terms out of the given alternatives.<br> WFB, TGD, QHG, ?

9, 27, 31, 155, 161, 1127, ?

125, 80, 45, 20, ?

One term in the number series is wrong. Find out the wrong term.<br>0, 2, 3, 5, 8, 10, 15, 18, 24, 26, 35

Choose the missing terms out of the given alternatives : Z, U, Q, ?, L