Divisibility Test Calculator
Check Divisibility Rules
Test if a number is divisible by 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12 with detailed rules and explanations.
Enter Number
Enter a positive integer (max 1,000,000,000)
Divisibility Rules
Last digit is even (0, 2, 4, 6, 8)
Sum of digits is divisible by 3
Last two digits form a number divisible by 4
Last digit is 0 or 5
Divisible by both 2 and 3
Double the last digit and subtract from remaining number, repeat if needed
Last three digits form a number divisible by 8
Sum of digits is divisible by 9
Last digit is 0
Alternating sum of digits is divisible by 11
Divisible by both 3 and 4
Features
- Tests divisibility by 2-12
- Detailed rule explanations
- Step-by-step calculations
- Prime factorization
- Visual result indicators
- Copy results
- Quick examples
- Large number support
Quick Tips
Always divisible by 2
Always divisible by 5
Always divisible by 10
If divisible by 6, also by 2 and 3
Use Cases
- Math homework and learning
- Number theory problems
- Factorization exercises
- Prime number testing
- Mental math practice
- Teaching divisibility rules
- Quick calculations
- Programming algorithms
Educational Benefits
Learn Mathematics:
Understand number patterns and properties
Improve quick calculation skills
Foundation for advanced mathematics
Apply rules to solve complex problems
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