BRAIN TEASERS

enter your answer and press button OK

How many handshakes will there be in total?

At the end of a banquet, 10 people shake hands with each other. How many handshakes will there be in total?

Correct answers: 132

The first user who solved this task is Donya Sayah30.

#brainteasers #math #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

This morning as I was buttonin...

This morning as I was buttoning my shirt, a button fell off.
After that, I picked up my briefcase, and the handle fell off.
Then I went to open the door, and the doorknob fell off.
I went to get into my car, and the door handle came off in my hand.
Now I'm afraid to pee.

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...

Willem J. Kolff

Born 14 Feb 1911; died 11 Feb 2009 at age 97.Willem Johan Kolff was a Dutch-American physician and biomedical enginer who pioneered artificial organs. He invented the artificial kidney machine in 1943, before he emigrated to the U.S. (1950). In Spring 1955, the American Society for Artificial Internal Organs was formed. Kolff became its first president. He headed a team which invented the first totally artificial heart, a pneumatic pump, which was tested on 12 Dec1957, implanted within the chest of dog. It kept the 20.7-kg dog alive for 90 minutes. This was the first time an animal had lived with an implanted totally artificial heart. By 2 Dec 1982, under his supervision, the first fully artificial heart was implanted in a human patient. It was designed by Robert K. Jarvik, one of Kolff's students, that implanted the artificial heart which kept the patient, Barney Clark, alive for 112 days, thus proving the viability of such a procedure.«

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.