А) 56 = 2 * 2 * 2 * 7 70 = 2 * 5 * 7
НОК (56 и 70) = 2 * 2 * 2 * 5 * 7 = 280
б) 78 = 2 * 3 * 13 792 = 2 * 2 * 2 * 3 * 3 * 11
НОК (78 и 792) = 2 * 2 * 2 * 3 * 3 * 11 * 13 = 10 296
в) 320 = 2 * 2 * 2 * 2 * 2 * 2 * 5
720 = 2 * 2 * 2 * 2 * 3 * 3 * 5
НОК (320 и 720) = 2 * 2 * 2 * 2 * 2 * 2 * 3 * 3 * 5 = 2 880
г) 252 = 2 * 2 * 3 * 3 * 7 840 = 2 * 2 * 2 * 3 * 5 * 7
НОК (252 и 840) = 2 * 2 * 2 * 3 * 3 * 5 * 7 = 2 520
д) 42 = 2 * 3 * 7 63 = 3 * 3 * 7 НОК (42 и 63) = 2 * 3 * 3 * 7 = 126
е) 120 = 2 * 2 * 2 * 3 * 5 324 = 2 * 2 * 3 * 3 * 3 * 3
НОК (120 и 324) = 2 * 2 * 2 * 3 * 3 * 3 * 3 * 5 = 3 240
ж) 675 = 3 * 3 * 3 * 5 * 5 945 = 3 * 3 * 3 * 5 * 7
НОК (675 и 945) = 3 * 3 * 3 * 5 * 5 * 7 = 4 725
з) 924 = 2 * 2 * 3 * 7 * 11 396 = 2 * 2 * 3 * 3 * 11
НОК (924 и 396) = 2 * 2 * 3 * 3 * 7 * 11 = 2 772