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Calculate the number 670

NUMBERMANIA: Calculate the number 670 using numbers [5, 8, 9, 6, 93, 100] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 2

#brainteasers #math #numbermania

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Birds changing lightbulb

How many birds does it take to change a lightbulb?

Ideally three, but Toucan.

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Priestley's laboratory destroyed

In 1791, chemist Joseph Priestley's laboratory, home and library in Birmingham were burned to destruction by a mob of people angry at his support of the French Revolution. Within a few years, on 7 Apr 1794, he forever left England and travelled to the United States. Priestley discovered oxygen nearly 20 years earlier, on 1 Aug 1774.

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