12.
144 = 2^4 x 3^2
252 = 2^2 x 3^2 x 7
300 = 2^2 x 3 x 5^2
cmmmc[144, 252,300] = 2^4 x 3^2 x 5^2 x 7
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cmmmc : 144 = 5^2 x 7
----------: 252 = 2^2 x 5^2
----------: 300 = 2^2 x 3 x 7
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Succes in continuare!
