BRAIN TEASERS

enter your answer and press button OK

Calculate the number 2878

NUMBERMANIA: Calculate the number 2878 using numbers [4, 7, 5, 4, 39, 282] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 1

#brainteasers #math #numbermania

Register with your Google Account and start collecting points.

Check your ranking on list.

Funny to do list

Funny to do list: 1. Get to pet store 2. Buy bird seeds 3. Ask how long it will take for the birds to grow 4. Wait for the reaction.

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...

First ballpoint pen

In 1945, the first ball point pen in the U.S. went on sale at Gimbels Department Stores for $12.95. In Jun 1945, Chicago businessman Milton Reynolds, during a visit to Buenos Aires, Argentina, sawLaszlo Biro’spen in a store, realized the pen’s sales potential and bought a few as samples. He returned to the U.S., anddesigned a copy in four months. He began production of his Reynolds’ Rocket pen, ignoring the patent rights of the Argentine manufacturer, Eversharp Co. On the first day of sale, $100,000 worth of his pen were sold. The initial success of Reynolds’ ballpoint pen as a fad did not last. It leaked and was unreliable. By 1948, the price fell below 50 cents. By 1951, his enterprise had failed.«

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.