BRAIN TEASERS

enter your answer and press button OK

Find number abc

If cc358 - abc58 = 2cb00 find number abc. Multiple solutions may exist.

Correct answers: 1

#brainteasers #math

Register with your Google Account and start collecting points.

Check your ranking on list.

I'm addicTED

I'm addicTED to inspirational 17-minute speeches.

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...

Musical Arcs

In 1900, Nature reported the Musical Arcs invented by William Du Bois Duddell, an English physicist. By means of an arrangement of electric currents he produced a musical note from an arc lamp that could be altered to any pitch is obtained and a tune played. This may be regarded as the first fully electric instrument. While investigating the noise produced by the operation of carbon arc lamps - anything from a low hum to a high-pitched whistle - he found that adding resonance circuits adjusted the pitch of the sounds. His Singing Arc demonstrated this phenomenon using a keyboard connected to an arc lamp, giving audible results without any amplifier. He toured the country with his Singing Arc, as a novelty performance.«*

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.