In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

What is black when you buy it, red when you use it, and gray when you throw it away?

It belongs to you, but other people use it more than you do. What is it?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

What building has the most stories?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Prove that twice of ten is the same as twice of eleven.

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

What does this mean?

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How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.