Question

ma puteti ajuta va rog

Answer 1

35 = 7 x 5 ; 21 = 7 x 3 => cmmmc (35,21) = 7x5x3 = 105

Answer 2

$21 = 3 \times 7 \\ \\ 35 = 5 \times 7 \\ \\ c.m.m.m.c = 3 \times 5 \times 7 = 105 \\ \\ M \: [21,35] < 400: 105,210,315 \: < = > (105,105 \times 2,105 \times 3)$