In these type of questions, certain pairs of numbers are given out of which all except one are similar in some manner while one is different. The numbers in these similar pairs may have the same property or may be related to each other according to the same rule. The candidate is required to choose the odd pair.

Options

A. 13-21
B. 19-27
C. 15-23
D. 16-25

Answer

To solve the problem of identifying the odd pair of numbers among the given options, we will analyze the differences between the pairs.

### Step-by-Step Solution:

1. **Identify the pairs of numbers:**
- Option 1: (13, 21)
- Option 2: (19, 27)
- Option 3: (15, 23)
- Option 4: (16, 25)

2. **Calculate the difference for each pair:**
- For Option 1:
\[ 21 - 13 = 8 \]
- For Option 2:
\[ 27 - 19 = 8 \]
- For Option 3:
\[ 23 - 15 = 8 \]
- For Option 4:
\[ 25 - 16 = 9 \]

3. **Compare the differences:**
- Option 1: Difference = 8
- Option 2: Difference = 8
- Option 3: Difference = 8
- Option 4: Difference = 9

4. **Identify the odd pair:**
- The first three options (1, 2, and 3) all have a difference of 8, while Option 4 has a difference of 9. Therefore, Option 4 is the odd pair.

### Conclusion:
The odd pair among the options is **Option 4: (16, 25)**.

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