Why do Chinese men eat more rice than Japanese men do ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What's the only room from which no one can enter or leave

A fresh card pile is taken out of a box (the pile has 54 cards including 2 jokers). One joker is taken out and then the cards are shuffled for a good amount of times. After shuffling, two piles are made by dividing that one pile.



What is the possibility that one of the piles will have a card sequence from A to K in order?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

He runs but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

What has lots of eyes, but can’t see?

What country can make you shiver?

A sea diver is a real show-off. He showed everyone that he can hold his breath underwater for 15 minutes.

I went to the diver and told him that I can be underwater for double the time i.e 30 minutes.
He responded that he will give me 100$ if I would be able to do it. I won 100$.

What did I do?