Which is faster, Heat or Cold ? Explain.

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

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

How can one talk without saying a single word?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What is the riddle which can be asked all day with a different correct answer each time.