Correct option is A
Given: 3, 14, ?, 16, -1, 18,-3
There are two alternating series:
· One series progresses with -2.
· The other series progresses with +2.
First Series (-2):
Starts from the 1st term (3):
1st term: 3
3rd term (missing): 3 - 2 = 1
5th term: 1 - 2 = -1
7th term: -1 - 2 = -3
Second Series (+2):
Starts from the 2nd term (14):
2nd term: 14
4th term: 14 + 2 = 16
6th term: 16 + 2 = 18
Final Sequence:
Combining both series:
3, 14, 1, 16, -1, 18, -3
The missing number is 1.
Correct option: (a) 1