When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Can it be possible to build a house that has all its four walls facing towards the South?

Decode the movie name from the below picture?

Can you decipher the two rows to find the hidden word?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Can you make the number 24 by utilizing the numbers 1, 3, 4 and 6? You must use one number only one time and you can use mathematical operation symbols anytime anywhere.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.