Can you solve the MAGNET RIDDLE? ft YouTube CEO Susan Wojcicki

1. Even if you do not break the bars with the mallet, you will destroy the magnitc property off the bar.
2. Use the string to improvise a compass
3. Use the file to shave of some metal and use the fillings to trace the magnetic lines
4. Spin the magnet close to the metal mallet. The magnet will induse current i the metal an slow down faster then the non magnetic bar.
5. If there is a tap run some water and the bar that is magnetic will deflect the stream a bit.

I think that should be a good start.  :-)