Завдання 301 - 400 » 337 (15-28)

15) НСК (9; 15) = 45; 5/9 = 25/45 і 2/15 = 6/45; 16) НСК (9; 21) = 63; 6/9 = 42/63 і 5/21 = 15/63; 17) НСК (15; 25) = 75; 4/15 = 20/75 і 7/25 = 21/75; 18) НСК (21; 35) = 105; 5/21 = 25/105 і 6/35 = 18/105; 19) НСК (9; 24) = 72; 5/9 = 40/72 і 5/24 = 15/72; 20) НСК (14; 21) = 42; 5/14 = 15/42 і 8/21 = 16/42; 21) НСК (15; 40) = 120; 7/15 = 56/120 і 9/40 = 27/120; 22) НСК (18; 27) = 54; 5/18 = 15/54 і 7/27 = 14/54; 23) НСК (20; 35) = 140; 11/20 = 77/140 і 8/35 = 32/140; 24) НСК (24; 18) = 72; 11/24 = 33/72 і 7/18 = 28/72; 25) НСК (10; 27) = 270; 7/10 = 189/270 і 19/27 = 190/270; 26) НСК (16; 21) = 336; 5/16 = 105/336 і 11/21 = 176/336; 27) НСК (12; 35) = 420; 5/12 = 175/420 і 8/35 = 96/420; 28) НСК (24; 25) = 600; 11/24 = 275/600 і 7/25 = 175/600.