BRAIN TEASERS

enter your answer and press button OK

Calculate the number 1281

NUMBERMANIA: Calculate the number 1281 using numbers [2, 4, 1, 5, 72, 715] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 18

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

Register with your Google Account and start collecting points.

Check your ranking on list.

Not saying a word without my lawyer

I’m not saying a word without my lawyer present.

Cop: You are the lawyer.

Lawyer: Exactly, so where’s my present?

Author Jarter16

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...

Sir Joseph Whitworth

Born 21 Dec 1803; died 22 Jan 1887 at age 83.English mechanical engineer (Baronet), who pioneered precision measurement. He held many patents for machine tools, textile and knitting machinery, and road-sweeping machines. He originated a scraping technique to make a true plane surface (1825). He advocated using the decimal system. In 1841, his standard screw threads were adopted by the Woolwich Arsenal. By 1851 Whitworth's machine tools were internationally known for their accuracy and quality, as well as his screw cutting lathes, his planing, drilling, slotting, and shaping machines, and his millionth-part measuring machine. He also did pioneering work in ordnance, creating a method for casting ductile steel to replace hard steel, which is subject to fracture.«

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.