I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

Which is faster, Heat or Cold ? Explain.

What has hands, but can’t clap?

What does this rebus means ?

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

What is the next number?

77, 49, 36, 18 ?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?