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?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What word is represented by this rebus?

How is the moon similar to a dollar?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?

John was piloting a plane behind a car but was never able to overtake it. Why?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).