What happened when the wheel was invented?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

What is next number in the pattern below:

131 517 192 123 ?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

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

How could a baby fall out of a twenty-story building onto the ground and live?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

People make me, save me, change me, raise me. What am I?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?