Math Arguments

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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Factors and Multiples



Least Common Multiple and Greatest Common Factor

A, B, and C are positive integers.

Greatest Common Factor of A and B is 5
Greatest Common Factor of B and C is 2
Greatest Common Factor of C and A is 3

Least Common Multiple of A and B is 900
Least Common Multiple of B and C is 2100
Least Common Multiple of C and A is 630


What is A?


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