Which of the following sentences are statements? Give reasons for your answer `:`
Answer this question.

Answer

To determine which of the given sentences are statements, we need to understand the definition of a statement in mathematical reasoning. A statement is a declarative sentence that is either true or false, but not both.

### Step-by-Step Solution:

1. **Identify the Sentences**: First, we need to list the sentences provided in the question. For example, let's say we have the following sentences:
- A: "The sky is blue."
- B: "2 + 2 = 5."
- C: "What time is it?"
- D: "All squares are rectangles."

2. **Evaluate Each Sentence**:
- **Sentence A**: "The sky is blue."
- This is a statement because it can be evaluated as either true or false depending on the time and conditions (e.g., during the day it is true, at night it is false).
- **Sentence B**: "2 + 2 = 5."
- This is a statement because it can be evaluated as false (the correct answer is 4).
- **Sentence C**: "What time is it?"
- This is not a statement because it is a question and cannot be classified as true or false.
- **Sentence D**: "All squares are rectangles."
- This is a statement because it can be evaluated as true (all squares are indeed rectangles).

3. **Conclusion**: Based on the evaluations:
- Statements: A, B, D
- Not a statement: C

### Final Answer:
The sentences that are statements are A, B, and D. Sentence C is not a statement because it is a question.