The numbers 12, 18, and 30 can be factored into their prime components: 12 = 2² × 3, 18 = 2 × 3², and 30 = 2 × 3 × 5. Each number shares common factors of 2 and 3, while 30 includes an additional factor of 5. Their greatest common divisor is 6, and their least common multiple is 180.
-18
18 + 12 = 30
30
30
It is: 12+18+30 = 60
30 - 18 = 12
Boys: 12/30 = 2/5 Girls: 18/30 = 3/5
48
42
42
42
18 + 12 = 30 18 - 12 = 6