I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Keyboard words are not in alphabetical order, Why?

What happened when the wheel was invented?

Can you start the fire using two pieces of wood?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Jack have ten pairs of black socks, eight pairs of white socks and seven pairs of green socks. Everything is mixed in a draw. As there is no light he were not able to identify the colour of the socks. How many of the socks did he want to take to match one pair

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Why do we preferably have round manhole covers and not square ones?