7 - Wikipedia 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 because in those countries, 7 is written with a "hook" on the left, as ① in the following illustration
7 (number) - New World Encyclopedia 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 line segments, but in some brands of calculators, 7 is written with four line segments
Symbolism - Fun Facts - Religion - Mythology - Number 7 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 the number 7 “the Septad” The seven colors of the rainbow
Number 7 - Facts about the integer - Numbermatics 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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