Question

c.m.m.m.c al nr 210 240 280

Answer 1

           210=2*5*7*3
           240=2*5*8*3
           280=2*5*7*4
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c.m.m.m.c=2*5*7*3*4
                =840

Answer 2

210=2·3·5·7⇒descompunere in factori primi;
240=2⁴·3·5;
280=2³·5·7;
⇒c.m.m.m.c=2⁴·3·5·7=16·3·5·7=48·5·7=240·7=1680;