Choose the correct alternative for the missing term in the series:
$A, B, D, G, ?$

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
Which of the following is the sixth to the left of the eleventh from the left end of the above arrangement?

In the arrangement $P, 2, 6, M, 9, K, S, 4, V, 7$,the positions of the $1^{st}$ and the $6^{th}$ elements are interchanged,those of the $2^{nd}$ and the $7^{th}$ are interchanged,and so on. Then,which of the following will be the $4^{th}$ element from the left end in the new arrangement?

How many such pairs of digits are there in the number $947863512$,each of which has as many digits between them in the number as they have between them when arranged in descending order?

Find out the wrong term from the given series.
$325, 259, 202, 160, 127, 105, 94$

Choose the correct alternative to complete the series: $...acca....ccca...acccc....aaa$