These questions are based on the following set of numbers.
$389 \quad 476 \quad 635 \quad 847 \quad 568$
Which number will be the smallest if the first and the last digits are interchanged in all the numbers?

Fill in the blank space for the given series with the correct alternative.
$3, 7, 15, 31, 63, (\dots)$

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?

Find out the wrong term from the given series:
$46080, 3840, 384, 48, 24, 2, 1$

Fill in the blank space for the given series with the correct alternative.
$66, 36, 18, (\ldots)$

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

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

If all the symbols are removed from the above arrangement, which element will be third to the left of thirteenth from the left?