Question

Harrison Stationery sells cards in packs of 5 and envelopes in packs of 16. If Eddie wants the

same number of each, what is the minimum number of cards that he will have to buy?​

Answer 1

The smallest amount of cards he needs to buy is 80.

Explanation:

What Eddie wants to find is the least common multiple. What a least common multiply is that you try to find the smallest number that both 5 and 16 go into.

Step 1: Find the LCM of 5 and 16

5 -> 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80

16 -> 16, 32, 48, 64, 80

Answer: The smallest amount of cards he needs to buy is 80.