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Calculate the number 1838

NUMBERMANIA: Calculate the number 1838 using numbers [4, 6, 5, 2, 68, 223] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 11

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

#brainteasers #math #numbermania

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His mother should ...

'His mother should have thrown him away and kept the stork.'

Mae West (1893-1980)

Picture: Everett Collection / Rex Features

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Photophone

In 1880, Alexander Graham Bell transmitted the first wireless telephone message on his newly-invented photophone. The photophone worked by projecting his voice through an instrument towards a mirror. The vibrations in the voice caused similar vibrations in the mirror. Bell directed sunlight into the mirror, which captured and projected the mirror's vibrations. The vibrations could be deconstructed back into sound at the receiving end of the projection. In this way the photophone functioned similarly to the telephone; the difference was that the photophone used light as a means for projecting the information, while the telephone used electricity.

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