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Calculate the number 3939

NUMBERMANIA: Calculate the number 3939 using numbers [1, 4, 6, 6, 13, 989] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 13

The first user who solved this task is Nasrin 24 T.

#brainteasers #math #numbermania

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How do you get down off an elephant?

How do you get down off an elephant?
You don't, you get down off a goose.

Why are elephants always so broke?
They work for peanuts.

What do you call an elephant that doesn't matter?
Irrelephant.

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Sir Humphry Davy

Born 17 Dec 1778; died 29 May 1829 at age 50. English chemist (Baronet), who discovered several chemical elements and compounds, invented the miner's safety lamp, and epitomized the scientific method. With appointment to the Pneumatic Institution to study the physiological effects of new gases, Davy inhaled gases (1800), such as nitrous oxide (laughing gas) and a nearly fatal inhalation of water gas, (a mixture of hydrogen and carbon monoxide). Davy discovered alkali metals: potassium and sodium, an isolation made with electric current for the first time (1807); as well as alkaline earth metals: calcium, strontium, barium, and magnesium (1808). He discovered boron at the same time as Gay-Lussac. He recognized chlorine as an element, which prior workers confused as a compound.

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