If eleven plus two equals one, what does nine plus five equal?

Why is a river so rich ?

With the help clues provided in the image, can you find the 5 digit key?

Decode this picture on T-Shirt and tell what it says ?

Replace the question mark with the correct number in the below-given picture?

Optical Illusion: A cat is hiding in plain sight in the backyard. Only the most observant eyes can spot the cat in 7 seconds. Can you? Test your eye power now!

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Eight of us go fourth, not back, to protect our king from an attack. What are we?