Divisibility Rule for 10

The rule for determining if a number is divisible by 10 is straightforward:

A number is divisible by 10 if its last digit is 0.

Explanation

When examining a number, the last digit is crucial for checking its divisibility by 10. Here’s how it works:

• Last Digit = 0: If the last digit of the number is 0, then the number is a multiple of 10.
• Last Digit ≠ 0: If the last digit is anything other than 0, the number is not divisible by 10.

Steps to Check Divisibility by 10

1. Look at the Last Digit: Identify the last digit of the number.
2. Determine Divisibility: If the last digit is 0, the number is divisible by 10. If it’s not 0, then it isn’t divisible by 10.

Examples

Example 1: 50

1. Last Digit: 0
2. Conclusion: Since the last digit is 0, 50 is divisible by 10.

• Calculation: (50/10 = 5)

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Example 2: 120

1. Last Digit: 0
2. Conclusion: Since the last digit is 0, 120 is divisible by 10.

• Calculation: (120/10 = 12)

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Example 3: 45

1. Last Digit: 5
2. Conclusion: Since the last digit is not 0, 45 is not divisible by 10.

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Example 4: 890

1. Last Digit: 0
2. Conclusion: Since the last digit is 0, 890 is divisible by 10.

• Calculation: (890/10 = 89)

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Example 5: 3333

1. Last Digit: 3
2. Conclusion: Since the last digit is not 0, 3333 is not divisible by 10.

Summary

To check if a number is divisible by 10:

• Simply look at the last digit.
• If it is 0, the number is divisible by 10; if it is anything else, it is not.

This rule is one of the simplest and most commonly used for quickly determining divisibility by 10.