What should come in place of the question mark (?) in the given series?
717, 738, 757, ?, 789
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 774.
Given series: 717, 738, 757, ?, 789
717 + 21 = 738, 738 + 19 = 757, 757 + 17 = 774, 774 + 15 = 789