Choose the odd numeral pair in each of the following questions :

Options

A. 81-63
B. 24-48
C. 21-15
D. 13-39

Answer

To solve the problem of choosing the odd numeral pair from the given options, we will analyze each pair based on the sum of their digits.

### Step-by-Step Solution:

1. **Evaluate Option 1: 81 and 63**
- Calculate the sum of the digits of 81:
- \( 8 + 1 = 9 \)
- Calculate the sum of the digits of 63:
- \( 6 + 3 = 9 \)
- Both sums are equal: \( 9 \) and \( 9 \).

2. **Evaluate Option 2: 24 and 48**
- Calculate the sum of the digits of 24:
- \( 2 + 4 = 6 \)
- Calculate the sum of the digits of 48:
- \( 4 + 8 = 12 \)
- The sums are different: \( 6 \) and \( 12 \).

3. **Evaluate Option 3: 21 and 15**
- Calculate the sum of the digits of 21:
- \( 2 + 1 = 3 \)
- Calculate the sum of the digits of 15:
- \( 1 + 5 = 6 \)
- The sums are different: \( 3 \) and \( 6 \).

4. **Evaluate Option 4: 13 and 39**
- Calculate the sum of the digits of 13:
- \( 1 + 3 = 4 \)
- Calculate the sum of the digits of 39:
- \( 3 + 9 = 12 \)
- The sums are different: \( 4 \) and \( 12 \).

### Conclusion:
- From the analysis, we find that:
- Option 1: Sums are equal (9, 9)
- Option 2: Sums are different (6, 12)
- Option 3: Sums are different (3, 6)
- Option 4: Sums are different (4, 12)

The odd numeral pair is **Option 1: 81 and 63** because the sum of the digits is the same for both numbers, while the other options have different sums.