Which of the following is a proposition ?

Options

A. 5.6 is a decimal number
B. ` sqrt4` is 2
C. Mathematics is not interesting
D. 5 is an even integer

Explanation

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

Let's analyze the statements one by one:

1. **Statement: "5.6 is a decimal number."**
- This statement is true because 5.6 is indeed a decimal number. Since it can be classified as true, it is a proposition.

2. **Statement: "Root 4 is 2."**
- This statement is also true because the square root of 4 is indeed 2. Therefore, this is a proposition as well.

3. **Statement: "Mathematics is not interesting for some people."**
- This statement cannot be classified strictly as true or false because it is subjective. Different people have different opinions about mathematics. Hence, this is not a proposition.

4. **Statement: "5 is an even integer."**
- This statement is false because 5 is an odd integer. However, since it can be classified as false, it is still a proposition.

5. **Statement: "5 is not an even integer."**
- This statement is true because 5 is indeed not an even integer. Therefore, this is also a proposition.

In conclusion, the statements that qualify as propositions are:
- "5.6 is a decimal number."
- "Root 4 is 2."
- "5 is not an even integer."

**Final Answer:** The propositions are:
1. "5.6 is a decimal number."
2. "Root 4 is 2."
3. "5 is not an even integer."