Choose the correct alternative for the missing terms in the series: $R, M, ?, F, D, ?$

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?

To answer these questions, study the following arrangement of digits, letters and symbols carefully.

$6, N,P ,=,@, 7,1 ,\& , R, T, 3, L, ,B, \star, E ,4,\# , 8, G,H ,\$, 5, K,M ,?, 2, D,C$

Four of the following five are alike in a certain way based on the positions of the elements in the arrangement and hence form a group. Which one does not belong to the group?

Find out the wrong term from the given series.
$10, 14, 28, 32, 64, 68, 132$

Fill in the blank space for the given series with the correct alternative.
$165, 195, 255, 285, 345, (\ldots)$

Choose the correct alternative for the missing terms in the series: $W, V, T, S, Q, P, N, M, ?, ?$