A) 18=3^2*2
51=17*3
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[18, 51]=3^2*2*17*3=918
B) 200=2^3*5^2
350=2*5^2*7
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[200, 350]=2^3*5^2*7=1400
C) 24=2^3*3
44=11*2^2
28=7*2^2
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[24, 44, 28]=2^3*3*11*7=1848
D) 2400=5^2*2^5*3
3600=5^2*2^4*3^2
4200=2^3*7*3
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[2400, 3600, 4200]=2^5*5^2*3^2*7=50400
C.m.m.m.c=produsul factorilor comuni şi necomuni la puterea cea mai mare.
