Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

What has a ring but no finger?

What is black when you buy it, red when you use it, and gray when you throw it away?

Can you place three balls such that the equation shown in the picture holds true?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

I shave every day, but my beard stays the same. What am I?

What is at the end of a rainbow?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'