Find odd one out.

Options

A. VI
B. 7
C. IX
D. VII

Answer

To solve the problem of finding the odd one out among the given options, we can follow these steps:

1. **Identify the Options**: We have four options which are written in different numeral systems. Let's denote them as follows:
- Option 1: VI (Roman numeral for 6)
- Option 2: 7 (Hindu Arabic numeral)
- Option 3: IX (Roman numeral for 9)
- Option 4: VII (Roman numeral for 7)

2. **Classify the Numeral Systems**: Next, we categorize each option based on the numeral system used:
- Option 1 (VI) is in Roman numeral system.
- Option 2 (7) is in Hindu Arabic numeral system.
- Option 3 (IX) is in Roman numeral system.
- Option 4 (VII) is in Roman numeral system.

3. **Count the Occurrences**: We can now count how many options belong to each numeral system:
- Roman numeral system: Options 1 (VI), 3 (IX), and 4 (VII) - Total: 3 options
- Hindu Arabic numeral system: Option 2 (7) - Total: 1 option

4. **Identify the Odd One Out**: Since three options are written in the Roman numeral system and only one option (Option 2) is written in the Hindu Arabic numeral system, we can conclude that Option 2 is the odd one out.

5. **Final Answer**: Therefore, the odd one out is **Option 2: 7**.