Question

Ronna has volleyball practice every 4 days. Ronna also has violin lessons every 10 days. She has both activities today after school. When will she have both activities again on the same day?

Answer 1

Find the multiples of each:

4, 8, 12, 16, 20, 24

10, 20, 30

The common multiple is 20, so every 20 days both activities will be the same day.

20 days from today.