In each of the following questions, five (or four) numbers are given. Out of these four (or three) are alike in some way but rest one is different. Choose the one which is different from the other.

Options

A. 6
B. 12
C. 18
D. 7

Answer

To solve the question, we need to identify the number that is different from the others based on a common characteristic. Here’s the step-by-step solution:

### Step 1: List the given numbers
The numbers provided are: **6, 12, 18, and 7**.

### Step 2: Identify the common characteristics among the numbers
- **6, 12, and 18** are all multiples of **6**:
- \(6 \times 1 = 6\)
- \(6 \times 2 = 12\)
- \(6 \times 3 = 18\)

### Step 3: Check the fourth number
- The number **7** is not a multiple of **6**. It cannot be expressed as \(6 \times n\) for any integer \(n\).

### Step 4: Compare even and odd characteristics
- **6, 12, and 18** are all **even numbers**.
- **7** is an **odd number**.

### Step 5: Conclusion
Since **7** does not share the common characteristic of being a multiple of **6** and is also the only odd number among the group, we conclude that **7** is the odd one out.

### Final Answer
The number that is different from the others is **7**.

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