A person may not be a mathematician. Moreover, he may not even know this science at a minimal level, but it is hard to deny that a person sees mathematics almost everywhere. Numbers, figures and mathematical laws pursue a person everywhere, so it will be useful to learn something about this science.
1. Abraham de Moivre (mathematician from England) in his ripe old age suddenly realized that his sleep increases by 15 minutes each day. After that, he made a progression and determined the day when sleep would take the whole day. It happened on November 27 in 1754, and it was the day of his death.
2. Religious and believing Jews try with all their might to avoid any signs that are associated with the cross or symbolism of Christ. For example, instead of a plus in schools, they use an inverted "T".
3. The authenticity of a euro banknote can always be recognized by its serial number - this is a letter and 11 digits. It is necessary to change the letter to the number that is the ordinal number of this letter in the alphabet. After that, you need to add up all the numbers and add up the results until there is one digit. And if the result is 8, this indicates the authenticity of the bill. Another way is to add all the numbers, without a letter. The final result, consisting of letters and numbers, must match the country in which the bill appeared. For example, Germany is X2.
4. There is a version that Alfred Nobel refused to include mathematics in the long list of sciences for his award for personal reasons - Alfred's wife slept with a mathematician. But in reality, Nobel was single. There is no credible evidence as to why math was not included, but there are speculations. For example, even then there was a prize, but created by the Swedish king. Another version is that mathematics is a purely theoretical subject, therefore mathematicians are not able to do anything really important for people and humanity in general.
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5. There is such a figure as the Reuleaux triangle. It is formed through the intersection of three circles identical in radius, and the centers of these circles are located at the vertices of a triangle with equal sides. The drill created from this triangle allows only square holes to be drilled. It is worth remembering that drilling such holes using a Reuleaux triangle can have an error of 2 percent.
6. In Russian literature and mathematics, 0 does not belong to lists of natural numbers, but in the West, 0 is one of the representatives of the set of such numbers.
7. George Danzig, a mathematician from America, being just a university graduate student, was late for class one time and, after seeing several equations, he thought that these equations are common household tasks that need to be done. This task seemed to him much more difficult than what was usually given, but he fulfilled them and brought results to the teacher. And only after that he found out that he was able to solve 2 unsolvable equations of statistics. Moreover, these were the tasks that scientists could not solve for several years.
8. If you add up all the numbers on the roulette wheel, you get 666.
9. The notorious Sophia Kovalevskaya got acquainted with this science of numbers in her distant childhood - there was no wallpaper in her room, there were only lectures by the scientist Ostrogradsky about calculus.
10. In Indiana (USA) in 1897 a bill was issued, according to which the number of pi will be equal to 3.2. However, the bill did not become law due to the fact that a university professor intervened in this process in time.