Solve the mathematical equation in the picture below.

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What goes through cities and fields, but never moves?

What begins with T, ends with T, and has T in 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?

What do you see in the given picture?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Can you identify the hidden rebus in the image below?