Which of the following numbers will replace the question mark (?) in the given number series?
 56, 68, ?, 128, 176, 236

What will be the next number in the given series?
  3, 28, 4, 65, 5,126,6,.........?

In the following question , a series is given with one terms missing . Choose the correct alternative from the given ones that will complete the series :

21 , 26 , 33 , 42 , 53 , ? 

The average of 25 results is 18. The average of first twelve of them is 14 and that of last twelve is 17. Find the thirteenth result -

The series given below contains a sequence of numbers. Identify the incorrect combination.
1, 8, 3, 6, 5, 4, 6

In each of the following, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
5, 30, 155, 780, ?

Select the option that will fill in the blank and complete the given series.
0 , 7, 26, 63,124, 215, 342, 511, 728,___

Which of the following numbers will replace the question mark (?) in the given series
 13, 14, 23, 48, 97, 178, ?