Count the squares in the matchstick puzzle below?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

I look at you, you look at me I raise my right, you raise your left. What am I?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Can you find out the total number of triangles in the given figure?

Name a key which is hardest to turn.

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?