A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
EDCB, IHGF, MLKJ, ?
- AQPON
- BQLNO
- CKNOL
- DLMON
Solution & Step-by-step Explanation
Notice that each group consists of four consecutive letters written in reverse order:
E, D, C, B←B, C, D, E
I, H, G, F←F, G, H, I
M, L, K, J←J, K, L, M
Now examine the transition between the last letter of one group and the first letter of the next:
B
+7
I
F
+7
M
J
+7
Q
Alternatively, look at the first letters of each group:
E
+4
I
+4
M
+4
Q
Reversing the 4 consecutive letters starting downwards from Q gives: Q, P, O, N.
E, D, C, B←B, C, D, E
I, H, G, F←F, G, H, I
M, L, K, J←J, K, L, M
Now examine the transition between the last letter of one group and the first letter of the next:
B
+7
I
F
+7
M
J
+7
Q
Alternatively, look at the first letters of each group:
E
+4
I
+4
M
+4
Q
Reversing the 4 consecutive letters starting downwards from Q gives: Q, P, O, N.