Which of the following number is a non-integer?
A. 3
B. 6
C. 2.25
D. 0

The number that is a non-integer is:

**C. 2.25**

An integer is a whole number that can be positive, negative, or zero, but it does not have any fractional or decimal part. Since 2.25 has a decimal part, it is not an integer.

Would you like more details or have any other questions?

Here are 5 related questions you might find interesting:
1. What is the difference between rational and irrational numbers?
2. How do you determine if a number is an integer?
3. Can a negative number be an integer?
4. What are some examples of non-integers that are rational numbers?
5. How do integers differ from whole numbers?

**Tip:** Always check if a number has a decimal or fractional part to determine if it is an integer.

Learn how to identify non-integers in a set of numbers, including whole numbers and decimals. This problem helps students understand the concept of integers and decimals, perfect for Grades 5-6.

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