BRAIN TEASERS

enter your answer and press button OK

Find number abc

If 231a6 + 5baac = aa95b 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.

Look

Look, you can either agree with me or you can be wrong.

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...

Calliope patent

In 1855, Joshua C. Stoddard of Worcester, Massachusetts, received a patent for his calliope. The first instrument consisted of 15 whistles, of graduated sizes, attached in a row to the top of a small steam boiler. A long cylinder with pins of different shapes driven into it ran the length of the boiler. The pins were so arranged that when the cylinder revolved, they pressed the valves and blew the whistles in proper sequence. The different shapes enabled the operator to play notes of varying length. Later, Stoddard replaced the cylinder with a keyboard. Wires running from the keys to the valves enabled the operator to play the instrument like a piano. He patented a successful hay rake in 1879 and a fire escape in 1884. He died on April 4, 1902.

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.