Which of the following letter-clusters will replace the question mark (?) in the given series?
EG, FF, HI, KH, OK, TJ, ?
- AAM
- BZL
- CZM
- DYJ
Solution & Step-by-step Explanation
Let's split each cluster into its first and second letters and find their individual patterns:
First letter sequence: E, F, H, K, O, T, ?
E
+1
F
F
+2
H
H
+3
K
K
+4
O
O
+5
T
T
+6
Z (since 20+6=26, which corresponds to Z)
Second letter sequence: G, F, I, H, K, J, ?
G
−1
F
F
+3
I
I
−1
H
H
+3
K
K
−1
J
J
+3
M (since 10+3=13, which corresponds to M)
Combining both results, the missing letter-cluster is ZM.
First letter sequence: E, F, H, K, O, T, ?
E
+1
F
F
+2
H
H
+3
K
K
+4
O
O
+5
T
T
+6
Z (since 20+6=26, which corresponds to Z)
Second letter sequence: G, F, I, H, K, J, ?
G
−1
F
F
+3
I
I
−1
H
H
+3
K
K
−1
J
J
+3
M (since 10+3=13, which corresponds to M)
Combining both results, the missing letter-cluster is ZM.