Respond to each Daily Brainteaser by emailing, with your answer, to paul@rbcyouth.ca! You can make up to 3 guesses for each Daily Brainteaser.
Today’s Brainteaser: 
 
Friday:
 
“To use me you must throw me away, but you will retrieve me when I am no longer needed. What am I?”
 
Submit your answers to paul@rbcyouth.ca!