Number Theory Level 6: Divisibility (2-6). divisibility rule.
1. Check divisibility by 2
Use the rule for the selected divisor; do not trial-divide blindly.
Select the digits or multiple required by this divisor.
2. Check divisibility by 3
Check divisibility by 2
Apply the selected rule exactly.
3. Both rules decide
Check divisibility by 2
Check divisibility by 3
Yes
Read the divisibility relation and its semantic answer.