What number do you get when you multiply all of the numbers on a telephone's number pad?

A blonde put eyeliner on her head. Why?

Can you find a five letter word that is left with only two letters if one is removed?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

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 ?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

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?