At a local hardware store Ms.jones learned that 1 would cost her $50, 12 would cost $1.00, and the price of 144 would be $1.50 what was Ms. Jones buying?
This is more of a riddle. She is buying numbers that can be used like to display the address of a house. "1" requires 1 such number; 12 requires 2 numbers; 144 numbers requires 3. The numbers cost .50 each