Which letter cluster will replace the question mark (?) to complete the given series?
TUBE, SXEH, ?, QDKN, PGNQ
- ARAHK
- BRADG
- CRAKH
- DRAGD
Solution & Step-by-step Explanation
Let's analyze the pattern positional step-by-step for each letter of the clusters:
1st letter sequence:
T
−1
S
−1
R
−1
Q
−1
P
2nd letter sequence:
U
+3
X
+3
A
+3
D
+3
G
(Note: X+3→Y, Z, A)
3rd letter sequence:
B
+3
E
+3
H
+3
K
+3
N
4th letter sequence:
E
+3
H
+3
K
+3
N
+3
Q
Combining all the positions, the missing cluster is RAHK.
1st letter sequence:
T
−1
S
−1
R
−1
Q
−1
P
2nd letter sequence:
U
+3
X
+3
A
+3
D
+3
G
(Note: X+3→Y, Z, A)
3rd letter sequence:
B
+3
E
+3
H
+3
K
+3
N
4th letter sequence:
E
+3
H
+3
K
+3
N
+3
Q
Combining all the positions, the missing cluster is RAHK.