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?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

One night, a man runs away from home. He turns left and keeps running. After some time he turns left again and keeps running. Later, he turns left one more time and runs back home—but when he gets home, he finds a man in a mask. Who was the man in the mask?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What word is pronounced the same if you take away four of its five letters?

The more of this there is, the less you see. What is it?

What does this below rebus puzzle mean?

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.

You can see it everyday, But cannot touch it at will. What is it?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain