BRAIN TEASERS

enter your answer and press button OK

Find number abc

If 71b20 - caaac = 11b2c find number abc. Multiple solutions may exist.

Correct answers: 2

#brainteasers #math

Register with your Google Account and start collecting points.

Check your ranking on list.

A secretary walked into her bo...

A secretary walked into her boss's office and said, "I'm afraid I've got some bad news for you."
"Why do you always have to give me bad news?" he complained. "Tell me some good news for once."
"Alright, here's some good news," said the secretary. "You're not sterile."

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...

Arago announces electromagnetism

In 1820, Francois Arago announced that a copper wire between the poles of a voltaic cell, could laterally attract iron filings to itself (Ann. de Chim. et de Physique., xv. p.93). His discovery came in the same year that Oersted discovered that an electric current flowing in a wire would deflect a neighbouring compass needle. Arago in the same publication described how he had successfully succeeded in causing permanent magnetism in steel needles laid at right angles to the copper wire. Arago and André-Marie Ampère, discussed and experimented with forming the copper wire into a helix to intensify the magnetizing action. However, it was not until 1825 that the electromagnet in its familiar form was invented by William Sturgeon.«

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.