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Calculate the number 8173

NUMBERMANIA: Calculate the number 8173 using numbers [8, 5, 7, 4, 30, 620] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 11

The first user who solved this task is Nasrin 24 T.

#brainteasers #math #numbermania

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Blind date

How was your blind date?" a college student asked her roommate.

"Terrible!" the room-mate answered. "He showed up in his 1932 Rolls Royce."

"Wow! That's a very expensive car. What's so bad about that?"

"He was the original owner."

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Folding chair

In 1889, a folding chair was patented by black American inventors John E. Purdy and James R. Sadgwar of Washington, D.C. (U.S. No. 405,117). They described a design for a "cheap, strong and durable chair which is capable of being folded into small compass, so as to be easily portable. The invention consists in the peculiar manner of jointing or hinging the frame and in details of construction." Each leg had two sections hinged together. The seat could be canvas, carpet, or any such ordinary flexible material. "When folded, this chair makes a remarkable small and compact bundle... in very convenient form to be carried in a bag or shawl-strap... making a most convenient article for artists, tourists, &c."

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