Divisibility Trios
factors and multiples · greatest common factor of three numbers
Help students understand common factors and greatest common factor.
Divisibility Trios is a Grade 6 factors activity built around finding the greatest common factor of three numbers. Students begin with divisibility rules, move into prime factorization, and use common prime factors to identify the GCF. The examples push students beyond finding a factor of two numbers and help them see how the same factor must be shared across an entire trio.
Use it for whole-class reasoning, guided practice, or a transition from divisibility rules into greatest common factor. A final challenge asks students to create three numbers with a specified GCF, which turns the skill into a construction problem rather than only an answer-finding task. Create a free account to generate lesson support for Divisibility Trios. No credit card; 3 lesson generations for life.
- Grades:
- 6
- Materials:
- printable
- Classroom use:
- whole class
Standards alignment
Official Rules
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