Which is the correct shadow of the bird?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

Which English verb becomes past tense just by rearranging the letters?

Count the number of balls in picture below:

No matter how little or how much you use me, you change me every month. What am I?

10+10 and 11+11 can give you the same answer.

Explain how?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?