When it is alive we sing, when it is dead we clap our hands. What is it?

What has a bottom at the top?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

What does this Rebus Picture means ?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Why Wine Glass Stem is so long?

Can you count the number of lines in the below picture?