How many times can you subtract the number 5 from 25?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

81 x 9 = 801. What must you do to make the this equation true?

What does a man do only once in his lifetime, but women do once a year after they are 29?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

Can you count the number of triangles in the picture below?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Replace the question mark with the number below given a simple math problem.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?