Can you calculate the probability of getting a sum of six when a dice is thrown twice?

John was drowned by he was not wet. How?

There are forty elephants and they have forty-fore heads. How can this be possible?

Which five letter word can be added at the end of below word to form a
valid word?

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Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

There is something which is always coming but never arrives?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?