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Calculate the number 7730

NUMBERMANIA: Calculate the number 7730 using numbers [2, 8, 7, 5, 24, 971] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 12

The first user who solved this task is Nílton Corrêa de Sousa.

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Soft Hands

Q. What does a Jewish woman do to keep her hands soft and her nails so long and beautiful?
A. Nothing, nothing at all.

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Ice cream freezer

In 1848, an early U.S. patent for an ice cream freezer was issued to William G. Young of Baltimore, Md. (U.S. No. 5,601). The first freezer patent was issued to Nancy M Johnson on 9 Sep 1834 (No. 3254), which had a revolving shaft inside with two curved wings to move the cream in the freezer. Young's idea made the freezer itself turn rapidly within the ice-tub as well as the cream inside. A piston-rod had a perforated disk at its end to move the cream. It was designed to be used while both agitating the cream and turning the freezer using the weighted top-mounted handle. The beating both moved the cream into better contact with the cold sides, and the air trapped with its motion serves to make the cream lighter.«

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