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

File some of one of the metal off one bar.  If it sticks to both bars, the bar you filed is the magnet.  It the filings only stick to one bar, the bar you filed is non-magnetic.

Use a paper clip and rub/stoke it against one bar.  If the paper clip sticks to both bars, the bar you struck is magnetic.  If the paper clip sticks to only on, the bat you struck is non-magnetic.  😁