An old man is selling watermelons…
His pricelist reads: 1 for $3, 3 for $10
A young man stops by and asks to buy one watermelon.
“That’d be 3 dollars”, says the old man.
The young man then buys another one, and another one, paying $3 for each.
As the young man is walking away, he turns around, grins, and says,
“Hey old man, do you realize I just bought three watermelons for only $9? Maybe business is ...
