In the following question, four letter-number pairs are given. The letter-number on the left side of (–) is related to the letter-number on the right side of (–) with some Logic/Rule/Relation. Three pairs are similar on the basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.
(NOTE: Operations should be performed on the whole numbers, without breaking down the number into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed)
Show answer & explanation
Correct answer: B
Explanation
Analyzing the Number Relationship:
Check the numerical relationship between the left and right numbers:
1) 78 → 156
78×2=156 (correct)
2) 94 → 198
94×2=188 (wrong, not 198)
94×2+10=198
3) 108 → 216
108×2=216 (correct)
4) 136 → 272
136×2=272 (correct)
So, in 1, 2, and 4, the right number is exactly double the left number. In 3, it is not exactly double — it has an extra +10.
Analyzing the Letter Relationship:
Also check the letter shifts:
1) AV → BY
A → B (+1), V → Y (+3)
2) TC → UF
T → U (+1), C → F (+3)
3) LD → MG
L → M (+1), D → G (+3)
4) MI → NL
M → N (+1), I → L (+3)
The letter pattern (+1, +3) is consistent across all four options.
Only 2 does not follow the "multiply by 2" rule for the numbers.
94TC – 198UF is the odd one out.
Hence, the correct answer is option (2).