Calculate the number 547
[7214] Calculate the number 547 - NUMBERMANIA: Calculate the number 547 using numbers [4, 9, 2, 5, 13, 130] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 3
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Calculate the number 547

NUMBERMANIA: Calculate the number 547 using numbers [4, 9, 2, 5, 13, 130] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 3
#brainteasers #math #numbermania
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A very young couple exhibiting...

A very young couple exhibiting signs of extreme nervousness timidly approached the check-in desk of a large Manhattan hotel.
"Good evening, sir," said the official behind the desk, favouring the young man with a perceptive wink. "Suite 16?"
"Oh, no!" the young man responded quickly. "She's eighteen."
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African-American patents an ironing board

In 1892, a U.S. patent for a specialized “Ironing Board” was issued to the black American inventor, Sarah Boone, likely a former slave (No. 473,653). Her design featured a quite narrow padded board, curved to make it easier to iron sleeves. Numerous patents were issued before hers with similar titles. The first patent designated specifically as an “Ironing Table” was issued several decades earlier, in 1858, to W. Vandenburg and J. Harvey (No. 19,390). Unpatented styles evolved from long long before that, so no single inventor can be identified for the earliest ironing board. For example, J.H. Mallory's “Ironing Table,” patented 24 Oct 1871 (No. 120,296) more closely resembles today's adjustable-height, collapsible model.«
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