Four number pairs have been given out of which three are alike in some manner and one is differ...........

Logical Reasoning (CPO) Classification

Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different from the rest.

2 : 51

17 : 6

34 : 3

24 : 4

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Explanation:

Let’s break down each option:

- Option 1: 2 : 51

- 2 × 25 + 1 = 51

- First number × its square + 1… maybe, but let's check others.

- Option 2: 17 : 6

- 17 ÷ 3 = 5 remainder 2, doesn’t fit the earlier pattern.

- 17 - 11 = 6. That’s just subtraction.

- Option 3: 34 : 3

- 34 ÷ 11 = 3 remainder 1. Again, not matching clear logic.

- 34 - 31 = 3, same as before, subtracting 31.

- Option 4: 24 : 4

- 24 ÷ 6 = 4, clean division.

- 24 - 20 = 4, subtraction again.

But what this really means is: Options 2, 3, and 4 all fit a ’subtract a certain number’ pattern (for 17, subtract 11; for 34, subtract 31; for 24, subtract 20). Option 1 doesn’t fit this straight subtraction pattern at all—it's got its own unique formula.

So, the odd one is actually Option 1: 2 : 51—that number-pair is built in a totally different way.

Option 1: 2 : 51 is the different one.

Hope this clears it up!