Which letter replaces question mark?

What number should replace the question mark?

What number should replace the question mark?

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative:

$G4T, J10R, M20P, P43N, S90L$

Find the correct alternative for the question mark:

$3, 6, 5, 20, 7, 42, 9, ?$

What is the next number of the following sequence?

$2, 3, 4, 7, 6, 11, 8, 15, 10, ...$

Find the missing element based on the given pattern:

A piece of paper is cut out and labeled as shown in the diagram. It is folded along the dotted lines to make an open box. If the box is placed on a table so that the top of the box is open, then the label at the bottom of the box is:

In the following figure, a matrix of certain characters is given. These characters follow a certain trend, row-wise or column-wise. Find out this trend and choose the missing character accordingly?