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

How many Watermelons are there in the below picture?

Move four matchsticks to the below square to form three squares?

How can a man go eight days without sleep?

Find three numbers such that When we multiply three numbers, we will get the prime numbers. The difference between the second and the first number is equal to the third and second.

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What two things can you never eat for breakfast?

A spy was in Canada trying to steal insider information on how to set up new Maple Syrup factories in their country. He was introduced to the operations manager of the biggest factory in Canada. However, the manager was suspicious and decided to test him with a question before he trusted him. So he asked, “What would you be sure to find in the middle of Toronto?” The spy thought fast and came up with an answer for the manager. What was his answer?