I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Give it food and it will live; give it water and it will die.

Find the hidden tiger in the given optical illusion ?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Which tank will fill first?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?