Today, 13-11-16, is the day I sit down to write about Numbers, and for no good reason I pick the number 13.
Cause, you know, 1+3+1+1+1+6 = 13


1. Mathematically it is an odd natural number. It is also a prime number, happy number, fibonacci number.

2. To create life it requires 1 sperm and 1 ovum to combine to form a zygote.
1 sperm (13 chromosomes) + 1 Ovum (13 chromosomes) = zygote (26 chromosomes)

3. In Hindi 13 is called as ‘Terah’ which means ‘yours’. In the spiritual context it represents your karmas and in Indian astrology it denotes that everything, including your soul, belongs to God. However in Tarot it signifies fickleness, transformation, death of a suffering and a renewed beginning.

4. In Judaism, 13 signifies the age at which a boy matures and becomes a Bar Mitzvah ( a full member of the Jewish faith). A child becomes a teenager at age 13, and in the US, they can watch, rent, or buy a PG-13 film without parental guidance.

5. There are 13 lunar cycles in a year (13*28=364)

6. The Base 13 numeral system is called as the Tridecimal system. Here’s how numbers are counted in this sytem –
Binary 1 2 3 9 10 11 12 13 14 15 22 23 24 25 26 27
Base13 1 2 3 9  A  B  C 10 11 12 19 1A 1B 1C 20 21

7. In some countries 13 is considered to be an unlucky number. Probably because there were 13 people around the table at the last supper and particularly because of the success of the Friday the 13th movie. In triathlon, the number 13 is not used. As such, the numbering goes 11, 12, 14, 15 under the current numbering system. The number was not used in Formula One from 1977 to 2013.

8. Psychologists have an actual term for the fear of 13 – Triskaidekaphobia

9. In other countries such as Italy, 13 is considered a lucky number, while 17 is considered unlucky. The expression fare tredici (“to do 13”) means to hit the jackpot.

10. In 1982 the World Boxing Council determined that boxers were more likely to suffer fatal injury from round 13 to round 15, therefore boxing fights were universally limited to a maximum of 12 rounds only.

11. Apollo 13 is the only unsuccessful American moon mission.

12. A Baker’s dozen is not 12 but 13 🙂

13. According to Mr Krabs on Spongebob Squarepants, there are 13 dirty words. Squidward thought that there were only 7. “Not if you’re a sailor,” Mr Krabs replied.

6 thoughts on “13 Trivia!

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