So do you.

Now the box contains $40, and we both know it.

I sell the box to you for $30.

And we both walk away with a $10 profit.

jajajajajaja

Good one, kinda a gimme though

GIMME A HARDER ONE.

But only you make a profit.

No der

lol too funny

How do I walk away with a $10 profit? I spent $50 to get $40. Dumb riddle thingy is dumb.

One of my favorites:

Three guests check into a hotel room. The clerk says the bill is $30, so each guest pays $10. Later the clerk realizes the bill should only be $25. To rectify this, he gives the bellhop $5 to return to the guests. On the way to the room, the bellhop realizes that he cannot divide the money equally. As the guests didn't know the total of the revised bill, the bellhop decides to just give each guest $1 and keep $2 for himself.
Now that each of the guests has been given $1 back, each has paid $9, bringing the total paid to $27. The bellhop has $2. If the guests originally handed over $30, what happened to the remaining $1?

$25bill + $2 the bell hop kept + $3 for the guests = $30dollars
come at me bro.

first time i heard that one i almost went insane... it was mind boggling.

obv above genius..