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

Challenge question: (possible answer). I don't know much about physics but this is a guess.
I would take the mallet, smash into the walls and pull out some copper wiring. Then wrap that copper into a tight coil. Then drop the iron bars down the coil one at a time. Whichever one took the longest time to fall through the coil is the magnet.

Hey, I usually really like your riddles but the way you presented the magnets riddle was a bit misleading. You try and make us pause the video and solve it before giving any hints, but all you've told us is that there are two iron bars in a room and we have to work out which one is magnetic. You haven't told us if we're allowed to use anything else. 'Hints', in my view, should be ways to rephrase the question to try and get someone to think about the riddle in a different way; your 'hints' ADDED factors to the problem (i.e. you've got access to a mallet and a file strong enough to split the iron) which were not presented at the start at the problem. Just a suggestion as to how that riddle could have been more clear.