13 (thirteen) is the natural number following 12 and preceding 14. Folklore surrounding the number 13 appears in many cultures around the world: one theory is that this is due to the cultures employing lunar-solar calendars (there are approximately 12.41 lunations per solar year, and hence 12 "true months" plus a smaller, and often portentous ...

The number 13 has long been considered unlucky in many Western cultures. Even today — in a world far less superstitious than it was in the past — a surprising amount of people have a genuine, deep-rooted fear of the number 13, known as triskaidekaphobia.

2013年9月13日 · Researchers estimate that as many as 10 percent of the U.S. population has a fear of the number 13, and each year the even more specific fear of Friday the 13th, known as paraskevidekatriaphobia...

13是12和14之间的自然数。13还是奇数、质数、两位数。在数学中和之前的素数11组成孪生素数。

2022年10月21日 · The source of 13’s bad reputation – “triskaidekaphobia” – is murky and speculative. The historical explanation may be as simple as its chance juxtaposition with lucky 12.

2023年1月9日 · In everyday life, 13 is less common than 12. There’s no 13th month, 13-inch ruler, or 13 o'clock. By itself a sense of unfamiliarity won’t cause a phobia, but psychological research shows that we favor what is familiar and disfavor what is not. This makes it easier to associate 13 with negative attributes.

13 (thirteen) is a number. It comes after twelve and before fourteen. It is an odd number. Many people think thirteen is an lucky number, especially when Friday is the thirteenth day of the month. This is a superstition. There is no proof that thirteen is an unlucky number.

2022年8月6日 · Is Number 13 (十三) a lucky number? If you’ve heard about the number 13 as an unlucky number in Western culture, it’s quite the opposite for the Chinese people. You may have noticed that some businesses opt to skip the number 13 as odd numbers tend to have negative connotations in Western culture.

2025年2月15日 · There are 13 lunar months in the year (with a small error), which led the Maya and the Hebrews to consider 13 as auspicious. In medieval theology 13 = 10 + 3 (Commandments plus Trinity), and therefore the number had some positive aspects. The number 14 is an even number with attributes similar to those of 7.

2024年5月12日 · Number 13 holds a complex history of superstition, symbolism, and cultural significance, often associated with bad luck but also positive outcomes in certain contexts. The fear of number 13, known as triskaidekaphobia, is a widespread phenomenon with historical and cultural roots, and it continues to inspire works of art, literature, and ...