Question

Match List-I with List-II.\[\begin{array}{|c|c|} \hline \textbf{List-I (Letter number series)} & \textbf{List-II (Missing term)} \\ \hline \text{(A) D4,F6,H8,J10} & \text{(I) U121} \\ \hline \text{(B) 2B,4C,8E,14H, ?} & \text{(II) 11I} \\ \hline \text{(C) 3F,6G, ?,18L,27P} & \text{(III) 22L} \\ \hline \text{(D) W144, ?,S100,Q81,O64} & \text{(IV) L12} \\ \hline \end{array}\]

• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• (A) - (IV), (B) - (III), (C) - (I), (D) - (II)
• (A) - (IV), (B) - (II), (C) - (III), (D) - (I)

Hint:

When dealing with letter-number sequences, break down the series by examining the patterns in both the numbers and the letter positions.

Answer 1

The Correct Option is D

Step 1: Analyze each number series.
- (A) \( D4, F6, H8, J10, ? \): The alphabetical sequence is D, F, H, J, with numerical increments of 2. The next term is L12, matching List-II option IV.
- (B) \( 2B, 4C, 8E, 14H, ? \): The numerical progression is 2, 4, 8, 14. The letter progression is B, C, E, H. The next term is 28L, matching List-II option II.
- (C) \( 3F, 6G, ?, 18L, 27P \): The numerical progression is 3, 6, 12, 18, 27. The letter progression is F, G, I, L, P. The missing term is 12I, matching List-II option III.
- (D) \( W144, S100, Q81, O64 \): The alphabetical sequence is W, S, Q, O. The numerical sequence is 144, 100, 81, 64. The next term is M49, matching List-II option I.

Step 2: Conclusion.
The correct pairings are: (A) - (IV), (B) - (II), (C) - (III), (D) - (I).