BRAIN TEASERS

enter your answer and press button OK

What number can you subtract...

What number can you subtract half from to obtain a result of zero?

Correct answers: 33

The first user who solved this task is Manguexa Wagle.

#brainteasers #math #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

13 year old girls

Those 13 year old girls talking about “I need a man who…”. No, you just need to do your homework.

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...

Frederick George Donnan

Died 16 Dec 1956 at age 86 (born 5 Sep 1870).British chemist, born in Ceylon, whose research contributed to the development of colloid chemistry. He is remembered for his investigation of the Donnan Effect (1911) which advanced the understanding of the living cell. This is the effect of a semi-permeable membrane between two electrolytes and the electrical potential thereby produced. In other work with soap solutions, he related the efficiency of hydroxyl ions in the emulsification of oils to the formation of soaps on the surface of the drops. In wartime, he worked on the industrial-scale synthesis of ammonia and nitric acid. He was blind in one eye.«

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.