One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

We can be boring,Or interesting.
We can be long,Or short.
We can have pictures,Or just words.
Many love us,But many also hate us.
What are we?

Can you spot the hidden girl in the picture below?

Why do you find that most of the buildings are deprived of the 13th floor?

I am the fastest animal but cannot climb the tree. What am I?

Find the next number in the sequence

5 12 24 36 ?

There are forty elephants and they have forty-fore heads. How can this be possible?

What is the Surname of Barbie Doll?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?