Find the missing number?

Complete the series choosing the missing letters: 

pqrp__qq__rppp__qqr__r__qrppq__rr

Select the number that can replace the question mark (?) in the following series.   

16, 20, 29, 45, 70, ?

4, 32, 128, (…)

Find the missing number?

Find the missing number?

5255, 5306, __ 5408, 5459

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