Question

Sixty people are invited to a party. There are 24 cup in a package and 18 napkins in a package. What is the least number of packages of cups and napkins that can be bought if each party guest get one cup and one napkin?

Answer 1

• 3 packages of cups
• 4 packages of napkins

Explanation:

You need at least enough for 60, so any requirement for a partial package means you need to buy another whole package. The "ceiling" function gives the next higher integer for a non-integer value.

cups = ceiling((60 cups)/(24 cups/package)) = ceiling(2.5) packages

= 3 packages

__

napkins = ceiling((60 napkins)/(18 napkins/package))

= ceiling(3 1/3) packages = 4 packages