Question

BCNN(28,12,21)=?

Answer 1

`BC(28)=28;56;84;...`

`BC(12)=12;24;36;48;60;72;84;...`

`BC(21)=21;42;62;84;...`

Suy ra: `BCNN(28;12;21)=84`

Answer 2

BCNN(28;12;21)=84

Answer 3

28 = 2².7

12 = 2².3

21 = 3.7

BCNN(28; 12; 21) = 2².3.7 = 84