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

I found 7 Solutions:
1 
tie a string to them and let them align with the earth magnetic field.
2 
use the file to file some off the magnet. Magnetized dust will stick to stuff and itself.
3 
use your phone. Every smartphone has a magneto meter. Use a compas or sensor app to see the magnetic strength. ( the sensor is non magnetic so this is valid :) 

Now comes the cool stuff:
4
make a chain of paper clips or take a long wire. You the have to find a DC power source. A 9v battery or a laptop power supply will do. (office stuff, right?).
Make a big loop with your paper clips and let the bottom of the chain dangle free near your magnet or not magnet bar.
Now let current flow through your chain. The chain will move if it's in a magnetic field. ( you will may be damage your laptop charger if you do that and don't add a resistor in the circuit... The battery won't like it either) 

5 
find an old monitor or TV that runs with a cathode ray tube. Hold the magnet to the screen and you will see funny colors.

6
Technically like Nr 1 but much easyer. Take a lunchbox. Put the magnet in and let it float in a sink. The magnet will act like a compass.

7 
This one is really cool:
Drop it down a non magnetic metal tube. For example the metal handle of a broom or something like that. 
The magnet will fall slower. 


Unfortunately you can't use the magnet to magnetize other things to check if it's a magnet because everything that is magnetizeable is also magnetic...

Common Dianna find one more :P