Question

A restaurant had 60 plates. One night, 9 groups of 6 people ate dinner at the restaurant at the same time. How many plates were not used by these dinners.

Answer 1

You need to do 9 x 6, it would equal 45. Now, minus 60 - 45. The leftover plates would be 15.

Answer 2

The answer you are looking for is 15.

To find this, you must first find the total number of people who ate at the restaurant. Multiply 9 and 6 to get 45. The 45 represents the restaurant attendees. Being that it doesn't state the number of plates each person used, we can assume each person used a single plate. So, subtract 45 from 60. Thus getting 15 leftover plates.

I hope this helps!