The terms in the given alpha-numeric series follow a certain pattern. However, some terms are missing. Choose the correct sequence of the missing terms from the options given below:
Z_25YB23XC_W_19_E17
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → A, 21, D, V
Let us rewrite the series clearly by filling the blanks step-by-step:
Z _ 25 Y B 23 X C _ W _ 19 _ E 17
Step 1: Observe the pattern
Each pair of letters is followed by a number.
The number equals:
(Alphabetical position of first letter) − (Alphabetical position of second letter)
Step 2: Verify the pattern
- Z (26) − A (1) = 25
- Y (25) − B (2) = 23
- X (24) − C (3) = 21
- W (23) − D (4) = 19
- V (22) − E (5) = 17
Step 3: Fill the missing terms
So the completed series is:
Z A 25 Y B 23 X C 21 W D 19 V E 17
Missing terms (in order): A, 21, D, V