Each of the digits in the number 813924765 is arranged in ascending order from left to right. The position of how many digits will remain unchanged as compared to that in the original number?

The missing number in the series 28, 33, 31 ?, 34,39 is

Find the missing terms in the following series:
2, 15, 4, 12, 6, 7, ?, ?

Find the missing value '?'
4, 23, 60, 121,  ?

In the sequence 20, 10, 10, 15, 30, 75, X, find the value of X.

In the following question, select the missing number from the given series :
13, 35, 73, 215, 433, ?

Find the next number in the series:
9,20,38, 65, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
-36, -68, -132, -260, ?, -1028, -2052, -4100

What will come in place of the question mark (?) in the given series?
103 119 135 151 167?

Which of the following numbers will replace the question mark (?) in the given series?
111, 114, 119, ?, 135