Question : Direction: In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
A, CD, GHI, ?, UVWXY
Option 1: LMNP
Option 2: MNOL
Option 3: NOPL
Option 4: MNOP
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Correct Answer: MNOP
Solution : Given:
A, CD, GHI, ?, UVWXY
Each letter cluster is consecutive alphabetical series and the number of letters in consecutive letter clusters is one more than the previous one.
Also, the difference between the letter clusters is equal to the number of letters in the next letter cluster.
A, CD → CD has two letters, therefore, difference between them will be 2.
A + 2 = C. → CD.
CD, GHI → GHI has three letters, therefore, difference between them will be 3.
D + 3 = G.
GHI, ? → This missing letter will have 4 letters, therefore difference is also equal to 4.
I + 4 = 9 + 4 = 13 → M.
4 consecutive alphabets from M → MNOP
MNOP, UVWXY → UVWXY has five letters, therefore, difference between them will be 5.
P + 5 = U.
Therefore, MNOP is the missing term and the series is as follows –
A, CD, GHI, MNOP, UVWXY
Hence, fourth option is correct.
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