Which of the following letter-clusters will replace the question mark (?) in the given series?
PTXL, OSWK, NRVJ, ?, LPTH
- AMQVI
- BMQUI
- CNQUI
- DMQUJ
Solution & Step-by-step Explanation
Let's analyze the pattern position-by-position for each letter-cluster:
1st Letter:
P→O(−1)
O→N(−1)
N−1=M
M−1=L (Matches)
2nd Letter:
T→S(−1)
S→R(−1)
R−1=Q
Q−1=P (Matches)
3rd Letter:
X→W(−1)
W→V(−1)
V−1=U
U−1=T (Matches)
4th Letter:
L→K(−1)
K→J(−1)
J−1=I
I−1=H (Matches)
Every single position shifts back by −1. Thus, the missing cluster is MQUI.
1st Letter:
P→O(−1)
O→N(−1)
N−1=M
M−1=L (Matches)
2nd Letter:
T→S(−1)
S→R(−1)
R−1=Q
Q−1=P (Matches)
3rd Letter:
X→W(−1)
W→V(−1)
V−1=U
U−1=T (Matches)
4th Letter:
L→K(−1)
K→J(−1)
J−1=I
I−1=H (Matches)
Every single position shifts back by −1. Thus, the missing cluster is MQUI.