There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Can you make a fire with just a single stick?

Spot what is wrong here in below Picture?

How can you make number one disappear by adding something to it?

What can you serve, but never eat?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?