John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

I got a bee but no honey.
got an eye but am still blind.
got a sea but no water.
got a tea but no coffee.
got a why but no answer.

What Am I?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

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

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Why are televisions attracted to people?

What has no start, end, or centre?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?