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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 …

The number 7 is often considered lucky, and it has a definite mystique, perhaps because it is a prime number—that is, it cannot be obtained by multiplying two smaller numbers together.

Explore the curious properties of number 7, an odd number which is prime. Includes mathematical info, prime factorization, divisors, bases and much more! A fascinating reference for students, …

7 (seven) is the natural number following 6 and preceding 8. It is the only prime number preceding a cube.

The meaning of SEVEN is a number that is one more than six. How to use seven in a sentence.

7 is the smallest number of sides of a regular polygon that is not constructible by straightedge and compass. Number 7 or +7 or 007 is a dial the international call prefix for Kazakhstan. (00/+) is …