What always comes into a house through the keyhole?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

Optical Illusion: People with hawk eyes can spot a different car in 5 seconds. Can you? Test your vision now!

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

You can move only two matchsticks in the given picture. What is the highest number you can form by doing it?

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