Respuesta :
Answer:
30
Step-by-step explanation:
Use multiples for answering.
Multiples of 15: 15, 30, 45, 60...
Multiples of 10: 10, 20, 30, 40...
Both meet at 30.
Buy 2 packs of plates and 3 sleeves of cups and you can make the least amount of pairs with this combo.