Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

Find the missing number in the image below.

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you find the key in the picture below?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

Can you name an animal whose killing cannot be performed without spilling your own blood?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)