Answer:
Every 20 days you will have both clubs.
Step-by-step explanation:
Find least common multiple and it will be reccuring
You need to find the least common multiple of 4 and 10.
4, 8, 12, 16, 20, 24, 28, 32, 36, 40
10, 20, 30, 40
As you can see every 20 days you will have both, 20, 40, 60, 80, 100, etc etc.
