Question

Find the missing term:
ZA₅, Y₄B, XC₆, W₃D, __?

• A. UD₂
• B. VE₁
• C. V₄C
• D. DD₃

Answer 1

The Correct Option is B

To determine the missing term in the sequence ZA₅, Y₄B, XC₆, W₃D, let's analyze the pattern by breaking it down into two main components: the letters and the numbers.

Step-by-Step Analysis:

1. Observe the sequence of letters in the first position: 
   Sequence: Z, Y, X, W. 
   Pattern: The letters are in reverse alphabetical order, decreasing by one (-1) from Z to W.
   • ZA → YB → XC → WD → ?
2. Notice the sequence of letters in the second position: 
   Sequence: A, B, C, D. 
   Pattern: The letters are in alphabetical order.
   • ZA → YB → XC → WD → XE
3. Now, examine the subscript numbers: 
   Sequence: 5, 4, 6, 3. 
   Pattern: It alternates by -1 and +2. 
   • 5 → 4 (5 - 1)
   • 4 → 6 (4 + 2)
   • 6 → 3 (6 - 3)
   • 3 → X (3 + 2)
   • To maintain this pattern, the next number should be 3 - 2 = 1
4. Combining all these patterns, we find:
   • Letter: V (following W)
   • Second letter: E (following D)
   • Subscript: 1
5. Thus, the missing term is: VE₁

Conclusion:

Therefore, the answer is VE₁, matching the correct answer choice provided in the options.