Find number abc
[6717] Find number abc - If aa1bb - 4bcab = 31480 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 19 - The first user who solved this task is Nílton Corrêa de Sousa
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Find number abc

If aa1bb - 4bcab = 31480 find number abc. Multiple solutions may exist.
Correct answers: 19
The first user who solved this task is Nílton Corrêa de Sousa.
#brainteasers #math
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The Sentence

A schoolteacher asked her primary six class to construct sentences with the words: defeat, detail, defense.

There was a pause before a pupil raised his hand and said he could make a sentence with them; "The cow jumped over defense and detail went over defeat."
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Telescope

In 1851, the first U.S. patent for a telescope design was issued to Alvan Clark of Cambridge, Mass. (No. 8,509). Clark was a portrait painter who was interested in astronomy as were so many others at that time. He had made several small lenses and mirrors as a hobby. The fact that he could detect the small residual errors in one of the the best lenses Europe could offer convinced him that he could do as well. After he gained a reputation in Europe the American orders started to come in. The Alvin Clark Company became one of the foremost producers of some of the largest lenses for telescopes in the 1800's.*
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