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?

I always drive my customer away.

Who am I?

How many times do a clock's hands overlap in a day ?

What came first, the chicken or the egg?

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

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

It belongs to you, but other people use it more than you do. What is it?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?