A Divisibility Riddle
divisibility · matching divisibility rules and developing a rule for 12
Match divisibility rules with the appropriate number and experiment to find a rule that works for 12.
A Divisibility Riddle is a Grade 4 reasoning activity that asks students to match divisibility rules to the numbers they describe and then investigate a rule for 12. After sorting familiar rules for numbers such as 2, 3, 4, 5, 6, 8, 9, and 10, students experiment with examples to decide what conditions make a number divisible by 12.
This works as a whole-class investigation when you want divisibility to feel like pattern finding instead of rule memorization. The strongest part is the final question: students have to use what they already know to build a new rule and justify it. Create a free account to generate teacher-ready lesson support for A Divisibility Riddle. No credit card required, with 3 lesson generations for life.
- Grades:
- 4
- Classroom use:
- whole class
Standards alignment
Official Rules
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