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Three questions in senior high school mathematics must be tested
Of course. Find the greatest common divisor m of two numbers A and B first, and then find the greatest common divisor n of M and C, that is, the greatest common divisor of three numbers A, B and C. ..

Principle: N is the greatest common divisor of A, B and C. The factor of GTN is the intersection of A, B and C.

M is the greatest common divisor of A and B = = = The factor is the intersection of A and B factors.

The intersection of (the factor of m is the intersection of factors A and B) and (the factor of C) is the intersection of factors A, B and C.