When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

You can hear me, but you can't touch or see me.

What am I?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

Do You See It?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I taste better than I can smell. Who am I?

There is something which you can be arrested for attempting but not for successfully completing.

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

what's the probability of getting a king or a queen from a pack of 52 cards?