Which one of the following four-letter clusters does NOT belong to the group?
- APVTR
- BCIGE
- CWZXY
- DKQOM
Solution & Step-by-step Explanation
Let's convert each letter cluster into its numeric positions (A=1, B=2, ..., Z=26) and check the differences between consecutive letters:
Option A: PVTR
P = 16, V = 22, T = 20, R = 18
Differences: 16
+6
22
−2
20
−2
18
Option B: CIGE
C = 3, I = 9, G = 7, E = 5
Differences: 3
+6
9
−2
7
−2
5
Option C: WZXY
W = 23, Z = 26, X = 24, Y = 25
Differences: 23
+3
26
−2
24
+1
25
Option D: KQOM
K = 11, Q = 17, O = 15, M = 13
Differences: 11
+6
17
−2
15
−2
13
Clusters PVTR, CIGE, and KQOM all follow the exact same difference pattern: +6,−2,−2.
WZXY does not follow this rule. Therefore, WZXY is the odd cluster.
Option A: PVTR
P = 16, V = 22, T = 20, R = 18
Differences: 16
+6
22
−2
20
−2
18
Option B: CIGE
C = 3, I = 9, G = 7, E = 5
Differences: 3
+6
9
−2
7
−2
5
Option C: WZXY
W = 23, Z = 26, X = 24, Y = 25
Differences: 23
+3
26
−2
24
+1
25
Option D: KQOM
K = 11, Q = 17, O = 15, M = 13
Differences: 11
+6
17
−2
15
−2
13
Clusters PVTR, CIGE, and KQOM all follow the exact same difference pattern: +6,−2,−2.
WZXY does not follow this rule. Therefore, WZXY is the odd cluster.