BRAIN TEASERS

enter your answer and press button OK

What Comes Next in the Seque...

What Comes Next in the Sequence: 6, 15, 105, 5460, ??

Correct answers: 47

The first user who solved this task is Neelima Subrahmanyam.

#brainteasers #math #riddles

Register with your Google Account and start collecting points.

Check your ranking on list.

An inebriated man and his drun...

An inebriated man and his drunken friend were sitting at a bar.
"Do you know what time it is?" asked the drunk.
"Sure" said the man.
"Thanks" said the drunk.

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...

Helium ions from radium

In 1903, the journal Nature reported that helium gas is produced by the radioactive decay of the radium. This key discovery by William Ramsay and Frederick Soddy helped to reveal the structure of atoms. In 1908, Ernest Rutherford confirmed that alpha rays and these radium emanations were one and the same: the nuclei of helium atoms, bearing a positive electrical charge. Each were future Nobel laureates in Chemistry. Ramsey won the Nobel Prize in 1904 for his discovery of the noble gases. Rutherford was recognized in 1908 for his investigations into the disintegration of the elements. Soddy was honoured in 1921 for his pioneering contributions to understanding the chemical properties of radioactive elements such as radium and uranium.[Ref: Ramsay, W. & Soddy, F. Experiments in radio-activity, and the production of helium from radium. Nature, 68, 354 - 355, (1903)]

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.