BRAIN TEASERS

enter your answer and press button OK

Find the missing number

Correct answers: 188

The first user who solved this task is Eric Newton.

#brainteasers #math

Register with your Google Account and start collecting points.

Check your ranking on list.

9-1-1, what is your emergency?

"9-1-1, what is your emergency?"

"Help! I was hunting in the woods with my friend, and he suddenly dropped dead for no reason! Oh my God, I'm freaking out!!"

"Calm down, sir, we'll get you through this. The first thing we need to do is make sure that your friend really is dead."

"All right, hold on a second."

BLAM!

"Okay, now what?"

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...

First U.S. patent for artificial teeth

In 1822, Charles M. Graham of N.Y. was issued the first U.S. patent for artificial teeth. The record, and its details, was lost in the Patent Office fire of 15 Dec 1836. Similarly lost, the patent by William R. Eagleson for setting natural and artificial teeth (4 Oct 1817). False teeth had been used since Colonial years, with various attempts to replace rotten teeth, which were extraacted to avoid illness. George Washington had at least four sets of false teeth (though none were wooden, despite a myth to that effect). His first dentures were made using human teeth set into carved ivory. In 1789, dentist John Greenwood of New York, made Washington a complete set from hippopotamus ivory, gold wire springs and brass screws holding human teeth. His one natural remaining tooth was a molar, and a hole was left for it.«[Image: Closeup of George Washington's dentures (c.1790) with human teeth and modeled teeth carved from cow teeth and elephant ivory.]

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.