Find the missing number.

Find the missing number from the given alternatives.

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
I, L, O, R, ?

Study the given pattern carefully and select the number that can replace the question mark (?) in it.

Find the missing number?

In the given figure select the number that can replace the question mark (?).

Find the missing number in the following diagram?

Find the missing number from the below options.
6    24    96
7    28   112
13   52   ?