What will come in place of the question mark $(?)$ in the following alphabet series?
$CD, FG, JK, ?, UV$

These questions are based on the following letter/number/symbol arrangement. Study it carefully and answer the questions that follow.

$5, D,H,E, \star, 7,9, \$ ,F,I ,6 ,R ,\% ,L ,1 ,A,J, 3, B, \# ,4 ,@ ,K,P ,8, U,M, 2$

Which element will be fifth to the right of ninth from the right end if all the numbers are removed from the above arrangement?

These questions are based on the following set of numbers.
$738, 495, 329, 653, 849$
If in each number the positions of the first and the second digits are interchanged,which number will be the smallest?

Fill in the blank space for the given series with the correct alternative.
$4, 23, 60, 121, (\ldots)$

Fill in the blank space for the given series with the correct alternative.
$5, 9, 17, 29, 45, (\ldots)$

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?