Number Series Questions

In the following question, various terms of an alphabet series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives. AB, DEF, HIJK, ?, STUVWX

In the following question, select the missing number from the given series.
13, 27, 56, 115, ?

Find the next number in the series 64, 2, 32, 72, 3, 24, 76, 4, 19, ....., 5, 15.6

In the following questions a letter-series is given, in which some letters are missing. The missing letters are given in the proper sequence as one of the alternatives. Choose the correct alternatives. _ nmmn _ mmnn _ mnnm _

In the following question, various terms of an alphabet series are given with one or more terms missing as shown by (?). Choose the missing terms out of the given alternatives. BAZ, DCY, FEX, ?

In the following question, one term in the number series is wrong. Find out the wrong term.
3, 10, 27, 4, 16, 64, 5, 25, 125

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

5, 10, 13, 52, 57, ?

a _ c _ abb _ a _ bc _ bc _ ab