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

What part of Turkey has the most feathers?

What question can you never answer yes to?

Can you name four days which start with the letter 'T'?

Kareena is older than Katrina and younger than Karishma. Isabelle is younger than Bipasha and Karishma. Bipasha is older than Karishma. If Kareena and Isabelle are the same age, who's the youngest?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?

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

What have one eye but still cannot see?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain