Calculate the number 1576
[5136] Calculate the number 1576 - NUMBERMANIA: Calculate the number 1576 using numbers [5, 7, 2, 1, 36, 221] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 22 - The first user who solved this task is Thinh Ddh
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Calculate the number 1576

NUMBERMANIA: Calculate the number 1576 using numbers [5, 7, 2, 1, 36, 221] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 22
The first user who solved this task is Thinh Ddh.
#brainteasers #math #numbermania
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600 Story Hotel

Tom, Dick and Harry went to a party. After the party they returned to the hotel. The hotel was 600 stories high.
Unfortunately for them, the elevator was not working. They made a plan for the first 200 stories, Tom will crack jokes.
The second 200 stories Dick will tell a happy story and lastly Harry will tell a sad story.They then started up the steps

After 2 hours it was Harry's turn. He turned to the other two and said "Ok guys, here's my sad story. I forgot the keys downstairs.

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Howe truss patent

In 1840, William Howe was issued a U.S. patent (No. 1,711) for a Truss Bridge. It differed from his earlier patent (10 Jul 1840, No. 1685) because - importantly - he replaced the wooden post members in his frame with vertical iron rods, furnished with screw nuts, to effect tensioning. He described “straining up, and cambering” by tightening the screws. The frame had top and bottom horizontal members, and crossed diagonal braces and counter-braces. Although these were originally envisioned using timber, the Howe Truss was later used in steel bridges. It was popular as a railroad bridge because it had good strength over long spans. Timber truss covered bridges were also built as road bridges. Wooden walls and roof were added to protect the frame from weathering. A few remaining examples have been conserved.«[Image: detail of part of frame, showing vertical iron rods and wooden members.]
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