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Calculate the number 1281

NUMBERMANIA: Calculate the number 1281 using numbers [2, 4, 1, 5, 72, 715] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 18

The first user who solved this task is Djordje Timotijevic.

#brainteasers #math #numbermania

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Diego de Torres Villarroel

Died 19 Jun 1770 (born c. 1693).Spanish mathematician and writer, famous in his own time as the great maker of almanacs that delighted the Spanish public, now remembered for his Vida, picaresque memoirs that are among the best sources for information on life in 18th-century Spain. While young, his career encompassed being a dancer, musician, bullfighter, poet, lock picker, and seller of patent medicines. Later, upon reading a book on solid geometry, he turned to mathematics. In 1721 he wrote his first almanac, and in 1726 he was made professor of mathematics at the University of Salamanca.

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