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-Eleven is your go-to convenience store for food, snacks, hot and cold beverages, gas and so much more. Generally open 24 hours a day.
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, coders, engineers, scientists, puzzle-solvers, and anyone who enjoys numbers.
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.