As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Can you count the number of squares in the figure below?

A mathematician couple was having a Frappuccino in Starbucks sitting opposite to each other. Suddenly the guy noticed the text written on the paper in front of them and exclaimed that it was wrong. The girl denied it and said it is appropriate. Both are correct. What is written on the paper?

What do you answer even though it never asks you questions?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Can you find the 09 errors in the picture below?

What is at the end of a rainbow?

Can you find the six hidden animals in the picture below?