Which is faster, Heat or Cold ? Explain.

What has 88 keys?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

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

Can You Find the Missing Zero? A Number Puzzle that Will Trick Your Eyes

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Using Only Five 5's and any mathematical operator make sum as 37

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?