Solve the mathematical equation in the picture below.

There are forty elephants and they have forty-fore heads. How can this be possible?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What seven-letter word has hundreds of letters in it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

Find the missing number in the sequence below:

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

Until it is measured, not known. Yet how you miss it when it has gone. What is it?