A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
OP, RS, VW, ?, GH
- AZA
- BAB
- CCD
- DGE
Solution & Step-by-step Explanation
Let's analyze the transitions between the letter pairs by looking at the first letter of each pair:
From O to R: O(15)
+3
R(18)
From R to V: R(18)
+4
V(22)
Following the increasing step pattern (+3,+4,+5,+6), the next step should be +5:
From V to the next first letter: V(22)
+5
27≡A(1)
Let's check if the pattern continues to G:
From A to G: A(1)
+6
G(7) (This matches perfectly!)
Since each term consists of two consecutive letters (OP, RS, VW), the pair starting with A must be AB.
From O to R: O(15)
+3
R(18)
From R to V: R(18)
+4
V(22)
Following the increasing step pattern (+3,+4,+5,+6), the next step should be +5:
From V to the next first letter: V(22)
+5
27≡A(1)
Let's check if the pattern continues to G:
From A to G: A(1)
+6
G(7) (This matches perfectly!)
Since each term consists of two consecutive letters (OP, RS, VW), the pair starting with A must be AB.