Observation — Venn diagram for GCD and LCM of numbers
The prime factors of two (or three) numbers are distributed in a Venn diagram: the factors in the intersection give the GCD, all the factors give the LCM.
The intersection of the factors gives the GCD; the union of all the factors gives the LCM.
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Topics: Algebraic calculation
Concepts: GCD · LCM
Skills: Interpreting graphs