A number is divisible by 4, if

Options

A. the sum of the digits is divisible by `4`
B. the sum of the last two digits is divisible by `4`
C. the number formed by its last two digits is divisible by `4`
D. the last digit is divisible by `4`

Answer

To determine if a number is divisible by 4, we need to follow these steps:

### Step-by-Step Solution:

1. **Understand the Rule**: A number is divisible by 4 if the number formed by its last two digits is divisible by 4.

2. **Identify the Last Two Digits**: For example, consider the number 3620. The last two digits are 20.

3. **Check Divisibility**: Now, we need to check if 20 is divisible by 4. We can do this by dividing 20 by 4.

\[ 20 \div 4 = 5 \]

Since 5 is a whole number, this means that 20 is divisible by 4.

4. **Conclusion**: Since the last two digits (20) are divisible by 4, we can conclude that the entire number (3620) is also divisible by 4.

### Final Answer:
A number is divisible by 4 if the number formed by its last two digits is divisible by 4.

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