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Calculate the number 393

NUMBERMANIA: Calculate the number 393 using numbers [8, 2, 3, 6, 20, 25] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 44

The first user who solved this task is Sanja Šabović.

#brainteasers #math #numbermania

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Amos Eaton

Born 17 May 1776; died 10 May 1842 at age 65. American botanist, geologist and lawyer who promoted widespreadinterest in science through popular public lectures, as an innovative teacher, and his textbooks in chemistry, zoology and geology. His initial legal career (1802-10) ended with conviction for alleged forgery (perhaps unjustly). During his five years in prison, he enriched his knowledge of science. Thereafter, he made a lasting contribution to scientific education by developingd a teaching method in which students learnt by doing, including field trips and performing experiments. Supported by Stephen Van Rensselaer, he founded the Rensselaer School (1824), later renamed Rensselaer Institute. He set up a travelling school on a barge on the Erie Canal to observe geological formations and collect specimens, attended by Asa Fitch in 1826. Eaton taught for the rest of his life.«

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