John is the son of Jacob.
So,
Jacob is the_____of John's father?

Before Mount Everest was discovered, what was the highest mountain in the world?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Replace the question mark with the correct number.

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

I make two people out of one. What am I?

what does the below rebus means?

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?