Can you place three balls such that the equation shown in the picture holds true?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Can you solve the maths in the below-given picture equation?

Can you move 2 matchsticks to form four equal sized squares.

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

How many triangles do you see in the picture puzzle below?

I am written with two letters.
I said with the one.
I usually am seen with the two.

Who am I?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?