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Calculate the number 250

NUMBERMANIA: Calculate the number 250 using numbers [2, 5, 1, 7, 57, 138] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 37

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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Pie Rates

A slice of apple pie in Jamaica is $2.00. It is $2.50 in the Bahamas.

These are the pie rates of the Caribbean.

Author:koulnis

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Sir Charles Wheatstone

Died 19 Oct 1875 at age 73 (born 6 Feb 1802).English physicist who popularized the Wheatstone bridge, a device that accurately measured electrical resistance and became widely used in laboratories. He didn't actually invent the “Wheatstone Bridge”. His contemporary, Samuel Hunter Christie, came up with the idea of the bridge circuit, but Wheatstone set the precedent for using it in the way in which it has been most commonly used. Over time, the device became associated with him and took on his name. He did, however, invent the concertina (1829), the stereoscope (1838), and an early form of the telegraph. He also developed a chronoscope (1842) to determine the velocity of projectiles at an English gunnery.

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