Divisibility rules help determine if one number is divisible by another without performing the division. Here are the divisibility rules for numbers 1 through 10:

### 1. Divisibility by **1**:
- Every number is divisible by 1.

### 2. Divisibility by **2**:
- A number is divisible by 2 if the last digit is even (0, 2, 4, 6, or 8).

### 3. Divisibility by **3**:
- A number is divisible by 3 if the sum of its digits is divisible by 3.

### 4. Divisibility by **4**:
- A number is divisible by 4 if the last two digits form a number divisible by 4.

### 5. Divisibility by **5**:
- A number is divisible by 5 if its last digit is 0 or 5.

### 6. Divisibility by **6**:
- A number is divisible by 6 if it is divisible by both 2 and 3.

### 7. Divisibility by **7**:
- A number is divisible by 7 if, after doubling the last digit and subtracting it from the rest of the number, the result is divisible by 7. This is more complicated but effective.

### 8. Divisibility by **8**:
- A number is divisible by 8 if the last three digits form a number divisible by 8.

### 9. Divisibility by **9**:
- A number is divisible by 9 if the sum of its digits is divisible by 9.

### 10. Divisibility by **10**:
- A number is divisible by 10 if its last digit is 0.

Would you like more details or examples on any of these rules?

Here are five related questions:
1. What is the divisibility rule for 11?
2. How can divisibility rules be applied in large numbers?
3. Why does the sum of digits work for divisibility by 3 and 9?
4. How does the divisibility rule for 7 work with larger numbers?
5. What are the divisibility rules for prime numbers greater than 10?

**Tip**: Memorizing divisibility rules can speed up mental math and help in quickly checking factors during exams!

Learn the divisibility rules for numbers 1 through 10. Understand how to check if a number is divisible by another without performing long division. This guide covers rules for common numbers such as 2, 3, 5, 7, and 10, making it ideal for students in Grades 5-7.

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