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

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Which is the rope you never skip with?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

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?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

Which point will the car reach to go out?

John decided to give his bike 3 coats of paint. Which coat would go on the first?