BRAIN TEASERS

enter your answer and press button OK

Calculate the number 4937

NUMBERMANIA: Calculate the number 4937 using numbers [8, 7, 9, 5, 58, 721] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 32

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

Register with your Google Account and start collecting points.

Check your ranking on list.

A man is being arrested

A man is being arrested by a female police officer, who informs him, "Anything you say can and will be held against you." The man replies, "Boobs!"

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...

Rayon

In 1902, the "making of cellulose esters" was jointly patented by William H. Walker, Arthur D. Little and Harry S. Mork of Massachusetts. (U.S. No. 709922). A month later, on 28 Oct 1902, they also patented artificial silk (No. 712,200). Viscose was an early name for the product. The term rayon was adopted by the textile industry in 1924 to replace "artificial silk" and similar names. It was said to derive from the French for "shine" - a reference to its silklike lustre. Unlike most man-made fibers, rayon is not synthetic. Made from wood pulp, a naturally-occurring, cellulose-based raw material, rayon's properties are more similar to those of natural cellulosic fibers, such as cotton or linen, than those of petroleum-based synthetic fibers such as nylon.

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.