Complete the series: $4, -8, 16, -32, 64, (\ldots)$

If the numbers from $1$ to $45$ which are exactly divisible by $3$ are arranged in ascending order,with the minimum number at the top,which number would be at the ninth place from the top?

Choose the correct alternative for the missing terms in the sequence: $Z, L, X, J, V, H, T, F, ?, ?$

Choose the correct alternative to complete the series: $ab . . aa . . caab . . . c . abb . . . c$

Find out the wrong term from the given series: $8, 13, 21, 32, 47, 63, 83$.

Choose the correct alternative for the missing term in the series: $shg, rif, qie, pkd, ?$