Question

15 MULTIPLOS DE 30
MULTIPLOS DE 17 MULTIPLOS DE 18 E DE 20

Answer 1

24 de 17 36 de 18 e 40 de 20

Answer 2

30 = 1,  2, 3, 5, 6, 10, 15, 30
17 = 1, 17
18 = 1, 2, 3, 6, 9, 18
20 = 1, 2, 4, 5, 10, 20