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Calculate the number 2768

NUMBERMANIA: Calculate the number 2768 using numbers [3, 8, 1, 3, 28, 673] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 0

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Record balloon ascent

In 1862, a balloon ascent to a height of 7 miles was made by metereologist James Glaisher and his pilot Henry Tracey Coxwell. Although this was the greatest height then achieved by passengers in a balloon, its precise altitude is unknown because Glaisher lost consciousness and was unable to read the barometer. Death was narrowly avoided by the courageous efforts of the pilot. The height was estimated by extrapolating measurements already recorded on the ascent. Between 1862-66, Glaisher made balloon ascents, many of which were arranged by a committee of the British Association. Their objective was to carry out scientific observations such as the variation in temperature and humidity of the atmosphere at high elevations.«

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