Division by ....... is not defined.

Options

A. `1`
B. `2`
C. `0`
D. `10`

Answer

To solve the question "Division by ....... is not defined," we need to understand the concept of division, particularly when it involves zero.

### Step-by-Step Solution:

1. **Understanding Division**: Division is the process of splitting a number into equal parts. For example, dividing 10 by 2 means splitting 10 into 2 equal parts, which gives us 5.

2. **Identifying Division by Zero**: When we talk about division by zero, we are referring to a situation where we try to divide a number by zero. For example, if we try to divide 5 by 0 (5 ÷ 0), we are attempting to find how many times 0 can fit into 5.

3. **Why Division by Zero is Not Defined**: The reason division by zero is not defined is that there is no number that can be multiplied by 0 to give a non-zero number. For instance, if we say 5 ÷ 0 = x, then it implies that 0 * x = 5, which is impossible since any number multiplied by 0 is always 0.

4. **Conclusion**: Therefore, division by zero does not yield a meaningful result and is considered undefined in mathematics.

### Final Answer:
Division by zero is not defined.

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