Question

Rick has Math lessons every third day and French lessons every seventh day. If he has a Math lesson and a French lesson today, then what is the minimum number of days after which he will have both the lessons at the same day?

Answer 1

Answer:

21 days

Step-by-step explanation:

Hints to use:

1. Find if we are working with multiples or factors.

2. Find if we are solving for the minimum or greatest.

3 multiples = 3,6,9,12,15,18,21

7 multiples = 7, 14, 21

The only common one in both the numbers is 21, which means, the minimum number of days it will take for both the lessons to be on the same day, will be 21 days!

Hope I helped!!

Answer 2

Answer:

i think 21 days