You have 3 buckets, the first of size 4 gallons, the second of size 10 gallons and the third of size 15 gallons. Show that using these 3 buckets you can measure any number of gallons over 22 gallons....

Extracted text: You have 3 buckets, the first of size 4 gallons, the second of size 10 gallons and the third of size 15 gallons. Show that using these 3 buckets you can measure any number of gallons over 22 gallons. For example, you can make 24 gallons using 6 refills of the first bucket.