BRAIN TEASERS

enter your answer and press button OK

In the following circles, th...

In the following circles, the four outer numbers are used to calculate the number in the middle. Can you figure out the rule to determine what number should replace the question mark in the third circle?

Correct answers: 108

The first user who solved this task is Jakubovski Vladimir.

#brainteasers #math #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

Safe Sex

Every time I go on vacation my wife gets pregnant...
This year I'm taking her with me!

Jokes of the day - Daily updated jokes. New jokes every day.

Follow Brain Teasers on social networks

Brain Teasers

puzzles, riddles, mathematical problems, mastermind, cinemania...

Alice Hamilton

Died 22 Sep 1970 at age 101 (born 27 Feb 1869). American pathologist known for her research on industrial diseases. By actively publicizing the danger to workers' health of industrial toxic substances, she contributed to the passage of workmen's compensation laws and to the development of safer working conditions. In 1911, she accepted an appointment as special investigator for the U.S. Bureau of Labor. These duties led her into field investigations of mines, mills, and smelters. Concentrating at first on lead, the most widely used industrial poison, she compiled statistics dramatically documenting the high mortality and morbidity rates of workers. She later did the same for aniline dyes, picric acid, arsenic, carbon monoxide, and many other industrial poisons. Hamilton died when 101 yrs old.

This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.