A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
F, J, M, Q, T, X, ?
- AB
- BZ
- CY
- DA
Solution & Step-by-step Explanation
Let us look at the positional values of the letters in the English alphabet (F=6,J=10,M=13,Q=17,T=20,X=24):
F(6)
+4
J(10)
J(10)
+3
M(13)
M(13)
+4
Q(17)
Q(17)
+3
T(20)
T(20)
+4
X(24)
The pattern of shifts alternatingly switches between +4 and +3. Following this sequence, the next shift from X must be +3:
X(24)
+3
27≡A(1)
Hence, the next letter in the series is A.
F(6)
+4
J(10)
J(10)
+3
M(13)
M(13)
+4
Q(17)
Q(17)
+3
T(20)
T(20)
+4
X(24)
The pattern of shifts alternatingly switches between +4 and +3. Following this sequence, the next shift from X must be +3:
X(24)
+3
27≡A(1)
Hence, the next letter in the series is A.