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. `7-18`
B. `9-26`
C. `11-36`
D. `13-42`

Answer

To solve the problem of identifying the odd pair among the given options, we will analyze each pair of numbers to find a common rule or property that applies to most of them, while one pair will not fit that rule.

### Step-by-Step Solution:

1. **Identify the Pairs**: We have four pairs of numbers to analyze. Let's denote them as:
- Pair 1: (7, 18)
- Pair 2: (9, 26)
- Pair 3: (11, 36)
- Pair 4: (13, 42)

2. **Analyze Pair 1 (7, 18)**:
- Multiply the first number by 4: \( 7 \times 4 = 28 \)
- Subtract 10: \( 28 - 10 = 18 \)
- This pair follows the rule.

3. **Analyze Pair 2 (9, 26)**:
- Multiply the first number by 4: \( 9 \times 4 = 36 \)
- Subtract 10: \( 36 - 10 = 26 \)
- This pair also follows the rule.

4. **Analyze Pair 3 (11, 36)**:
- Multiply the first number by 4: \( 11 \times 4 = 44 \)
- Subtract 10: \( 44 - 10 = 34 \)
- This does not equal 36, so this pair does not follow the same rule.

5. **Analyze Pair 4 (13, 42)**:
- Multiply the first number by 4: \( 13 \times 4 = 52 \)
- Subtract 10: \( 52 - 10 = 42 \)
- This pair follows the rule.

6. **Conclusion**: The pairs that follow the same rule are Pair 1, Pair 2, and Pair 4. Pair 3 (11, 36) does not follow the same rule, making it the odd pair out.

### Final Answer:
The odd pair is **(11, 36)**.

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