2) 4 и 7
НОК(4,7) = 4 * 7 = 28
6) 12 и 20
НОК(12,20) = 60
4) 5 и 15
НОК(5,15) = 15
8) 15, 30 и 45
НОК(15,30,45) = НОК(НОК(15,30),45) = НОК(30,45) = НОК(15, НОК(30,45)) = НОК(15,90) = 90
2) 4 и 7
НОК(4,7) = 4 * 7 = 28
6) 12 и 20
НОК(12,20) = 60
4) 5 и 15
НОК(5,15) = 15
8) 15, 30 и 45
НОК(15,30,45) = НОК(НОК(15,30),45) = НОК(30,45) = НОК(15, НОК(30,45)) = НОК(15,90) = 90