Brain teaser

[Felty]

You see a nice bong you like for £97, but you're skint.

You borrow £50 off mum and £50 off dad.

This leaves you with £3 change, so you keep a quid and give a quid back to both your parents so you only owe them £49 each.

£49 + £49 = £98. Then add that quid that you took is £99, where's the other quid gone?


Mind fuck.

[Smith2]

£49 + £49 = £98.

True.

Then add that quid that you took is £99

Also true, but irrelevant. You don't add £1, you subtract it. That makes £97, the cost of the bong. Of the £3 that's change from the £100, your father has £1, your mother has £1, and you have £1.

[Felty]

You sir are a genius, I knew it had something to do with the quid you kept but couldn't figure out what. None of my mates, or any one at work could figure it out!

[Quazer]

Why not use the leftover 3 quid to pay both of them 1,50 back? I didn't really get the problem of this...

[Felty]

Just a thing I found on the tinternet dude, lets just say you kept the quid because you needed some skins haha

[Smith2]

I'm tempted to post the Monty Hall problem. That tends to polarise people quite sharply. I've seen people nearly come to blows over it.

[Felty]

Do it! Might kill an hour at work