When I went to the supermarket, I purchased four items. The following shows the cost of three of the items:
€1.50
€3.00
€4.00
The queue for the checkout was pretty long, so to quench my boredom I started playing with my pocket calculator while waiting.
I found out, to my surprise, that the four prices of the four items I purchased added to the same number as I got when I multiplied the four prices together.
What was the price of the fourth item?