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

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

I’m orange, I wear a green hat and I sound like a parrot. What am I?

Find the number of squares in the below-given picture.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

How many times do a clock's hands overlap in a day ?

why number 8549176320 is one of a kind?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.