Jaime Buelta: $7.11 in four prices and the Decimal type, revisited

I happen to take a look to this old post in this blog. The post is 7 years old, but still presents an interesting problem. “A mathematician purchased four items in a grocery store. He noticed that when he added the prices of the four items, the sum came to $7.11, and when he multiplied the … Continue reading $7.11 in four prices and the Decimal type, revisited