BRAIN TEASERS

enter your answer and press button OK

MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 60

The first user who solved this task is Alfa Omega.

#brainteasers #math #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

Mike Vecchione: Private Detective School

I went online to become a private detective. It was a private detective school online, and I paid online. But then I never heard from them again. I thought to myself, I either got ripped off or this is my first case.

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...

Ralph Wyckoff

Died 3 Nov 1994 at age 97 (born 9 Aug 1897). Ralph (Walter Graystone) Wyckoff was an American scientist, a pioneer in the application of X-ray methods to determine crystal structures and one of the first to use these methods for studying biological substances. He became famous in two areas of structural research: X-ray diffraction and electron microscopy. He developed a new technique of 'metal shadowing' for observation with the electron microscope. A specimen, such as a virus, is placed in a vacuum together with a heated tungsten filament covered with gold. Vaporized gold coated the side of the specimen nearest the filament, leaving a 'shadow' on the far side. This allowed better estimates to be made of their size and shape, as well as revealing details of their structure.

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.