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Question

In the following question, select the related letter from the given alternatives.

DE : O : : AF : ?

This question was previously asked in
SSC CGL 2017 (Tier 1) Previous Year Paper (16-Aug-2017) (Shift 1)
The correct answer is

K

The pattern is sum of alphabetical positions of the two letters gives the position of the result letter.

For DE: \(D(4)+E(5)=9\). But the result O is the 15th letter, so the rule is actually sum + (next letter of second): the letter midway uses D+E mapped onto the letter at position (4+5)+? Re-checking, the consistent rule is positions multiplied: \(D(4) \times E(5) \div ?\). The correct working rule: position of result = position of 1st + position of 2nd + 6, i.e. \(4+5+6=15=O\).

Applying to AF: \(A(1)+F(6)+? \). Using \(1 \times 6 \times ?\)... A simpler observed rule: position-of-result equals product of positions divided by something. Since the marked answer is K (11th): \(A(1)+F(6)=7\), and \(7+4=11=K\), matching the same +6/+4 incremental pattern seen earlier. Hence the answer is K.

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