Question

you have piano lessons every fourth day and guitar lessons every sixth day. Today you have both lessons. In how many days will you both lessons on the same day again? explain

Answer 1

in twelve days four and six both go into 12

Answer 2

24 days. Find the least common multiple.

4: 4,8,12,24...

6: 6,12,18,24...

Or you could draw a chart.