How many times is X immediately followed by C in the given letter series?
C F X C C X E C F X C E X E X E X C C E
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 3
Here an X is counted only when the letter just after it is C. Each X in the series is checked with its neighbours:
F X C (3rd term): counted
C X E (6th term): followed by E, not counted
F X C (10th term): counted
E X E (13th term): followed by E, not counted
E X E (15th term): followed by E, not counted
E X C (17th term): counted
So the count is three (3).