Which of the following numbers will replace the question mark (?) in the given series?
17, 25, 37, 53, 73, 97, ?

Correct option is C

Given, 17,25,37,53,73,97,?,
25−17=8
37−25=12
53−37=16
73−53=20
97−73=24
Now, let's list the differences:
8,12,16,20,24
We can see that the differences increase by 4 each time:
Following this pattern, the next difference should be:
24+4=28
Now, we add this difference to the last number in the series:
97+28=125
Thus, the number that replaces the question mark is 125.