Find number abc
[6727] Find number abc - If ab5b9 + 5b0b2 = 10cc71 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 24 - The first user who solved this task is Nasrin 24 T
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Find number abc

If ab5b9 + 5b0b2 = 10cc71 find number abc. Multiple solutions may exist.
Correct answers: 24
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Ballpen in space

When NASA first started sending up astronauts, they quickly discovered that ballpoint pens would not work in zero gravity.
To combat the problem, NASA scientists spent a decade and $12 billion to develop a pen that writes in zero gravity, upside down, underwater, on almost any surface including glass and at temperatures ranging from below freezing to 300 C.
The Russians used a pencil.

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John Deere

Died 17 May 1886 at age 82 (born 7 Feb 1804).American agricultural equipment inventor and pioneer manufacturer. As a blacksmith in a U.S. prairie town, he frequently repaired the wood and cast-iron plows of eastern U.S. design because the local soils were heavy and sticky. By 1838 he had produced three more suitable steel plows of his own new design, and more in following years, which expanded into the agricultural machine business he began upon moving to Moline, Ill. (1847). In another ten years, his annual production had increased ten-fold. Originally using imported English steel instead of cast iron, he converted to U.S. made steel when Pittsburgh steel plants could supply a suitable product. The company diversified with production of harrows, drills, cultivators and wagons.«
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