Question

Florence's Stationery sells thank-you cards in packs of 12 and birthday cards in packages of 9. Surprisingly, the store sold the same number of each type of card this month. What is the minimum number of each card type that the store must have sold?​

Answer 1

36

Explanation:

The lowest number is the least common multiple of 12 and 9.

12 = 2^2 * 3

9 = 3^2

LCM = 2^2 * 3^2 = 4 * 9 = 36

Answer: 36