A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

What work can one never finish?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

Prove that the below maths equation is true.

8 + 8 = 91

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?

What is the end of everything?

Count the number of triangles in the given picture.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?