Question : Directions: A series is given below with one term missing. Choose the correct alternative from the given ones that will complete the series.
CD, FA, IX, LU, ?
Option 1: TU
Option 2: RS
Option 3: OP
Option 4: OR
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Correct Answer: OR
Solution :
Given:
CD, FA, IX, LU, ?
Add 3 to the positional value of the first letter and subtract 3 from the positional value of the second letter of the previous terms to get the first and second letters respectively of the next term.
First letter of the series→C + 3 = F; F + 3 = I; I + 3 = L; L + 3 = O
Second letter of the series→D – 3 = A; A – 3 = X; X – 3 = U; U – 3 = R
So, from the above, OR is the required term of the series. Hence, the fourth option is correct.
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