Most people do not know the washing machine symbols

Here they are

If a man pees on a pregnancy test and it shows up as positive, it may be a sign of testicular cancer.

If you search for "atari breakout" in Google Images, you can play the game.

A bit of toothpaste can successfully fix a scratched cell phone screen.

If you cant send an Excel file because its too big, save it as .xlsb. This will shrink the size.

True - see other ways have

Toothpaste stops bathroom mirrors fogging

True - see here

Toothpaste removes scuffs from leather shoes

True - see here

Toothpaste removes ink from your clothes. Apply it to the stain, let it dry and then wash.

True - see here

Chewing gum while peeling onions will keep you from crying.

A different kind of battery test - 'dead' batteries will bounce while 'good' batteries will not

True

Free calendar prints in loads of formats

Are available here

Delete your browser cookies before you buy airline tickets. Ticket prices go up when you visit travel sites multiple times.

Accidentally text the wrong person? Immediately put your phone on airplane mode and once it fails to deliver, delete the message!

Can work but you gotta be quick or take battery out and remove sim.