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

One magnetized and one non-magnetized if they are both magnetized they repel each other when two north polarity met, but it just one magnetized...

1. Get a paper clip and try to make an attraction by get each  metals near the paper clip, if it will not get attracted that one is non-magnetized...
2. If not using iron of any sort of sizes and shapes. If you have an aluminium fry pan hanging freely with the ceiling without any wind and try moving the magnet back and fort at the distance of 1 inch or 1/2 inch. If the aluminium fry pan moves it is the one that is magnetized...
3. Try to get a thread and try to tie it to its center mass and hang for five minutes when there is no movement, the one that is always pointing north is magnetized. Make sure there is no iron metals near the field at the radius of 3 feet just to make sure there is no interference...