Which of the following is not statement?

Options

A. 3 + 5= 11
B. x + 5= 9
C. 25 is a perfect number
D. 27 is a perfect number

Answer

To determine which of the given options is not a statement, we first need to understand what constitutes a statement. A statement is a declarative sentence that can be classified as either true or false, but not both.

### Step-by-Step Solution:

1. **Identify the Options**: We need to analyze each option provided in the question to see if it can be classified as a statement.

2. **Evaluate Option 1**:
- The first option is "3 plus 5 is equal to 11."
- This can be evaluated as false because 3 plus 5 equals 8, not 11.
- Since we can classify this statement as false, it is indeed a statement.

3. **Evaluate Option 2**:
- The second option is "x plus 5 equals 9?"
- This is a question that involves a variable (x). Depending on the value of x, the statement can be true or false.
- For example, if x = 4, then the statement is true (4 + 5 = 9). If x = 1, then the statement is false (1 + 5 ≠ 9).
- Since this statement cannot be definitively classified as true or false without knowing the value of x, it is not a statement.

4. **Evaluate Option 3**:
- The third option is "5 is a perfect number."
- This can be evaluated as false because 5 is not a perfect number (the perfect number closest to 5 is 6).
- Since we can classify this statement as false, it is indeed a statement.

5. **Evaluate Option 4**:
- The fourth option is "27 is a perfect number."
- This can also be evaluated as false because 27 is not a perfect number.
- Since we can classify this statement as false, it is indeed a statement.

6. **Conclusion**:
- After evaluating all options, we find that option 2 ("x plus 5 equals 9?") is the only one that cannot be classified as either true or false without additional information. Therefore, it is the correct answer as the option that is not a statement.

### Final Answer:
The option that is not a statement is **Option 2: "x plus 5 equals 9?"**