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Most devices use three line segments, but devices made by some Japanese companies such as Sharp and Casio, as well as in the Koreas and Taiwan, 7 is written with four line segments …

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On the seven-segment displays of pocket calculators and digital watches, 7 is the number with the most common glyph variation (0, 6 and 9 also have variant glyphs). Most calculators use three …

In medieval education, students pursued the trivium (grammar, rhetoric, and logic) and the quadrivium (music, arithmetic, geometry, and astronomy), a total of seven subjects, …

Number 7 is the number of perfection, security, safety and rest. Seven contains the number three of the heavens and soul with the number four of the earth and body. The Pythagoreans called …

Your guide to the number 7, an odd number which is prime. Mathematical info, prime factorization, fun facts and numerical data for STEM, education and fun.

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In Roman numerals, it is VII. In mathematics, the number seven is an odd number and a prime number. It is also a Mersenne prime. Take off the last digit and multiply it by 2. Subtract that …

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