Divisible 100 facts

While investigating facts about Divisible 100, I found out little known, but curios details like:

One of the reasons a full circle is 'decided' to be 360 degrees (and not a more obvious number, such as 100) because 360 is divisible by 24 different numbers, which makes it easy for math calculations. In contrast, 100 is only divisible by 9 different numbers.

Sea kale propagates via seeds, division and root cuttings. When cultivated from seed, sea kale reaches maturity 100 days after sowing, but its nutritional value isn"t optimal until the third season.

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 22 of the best facts about Divisible 100 I managed to collect.

1. The leap year occurs whenever the year is divisible by 4. This is not applicable if the year is divisible by 100, UNLESS it is also divisible by 400.

2. There is an interview screening device commonly used by employers when hiring computer programmers that weeds out the unfit. The interviewee is asked write a program that counts from 1 to 100, but replaces numbers divisible by given numbers with "Fizz" and "buzz".

3. Leap years don't actually happen every four years. Leap days are added in years divisible by four, unless the year is also divisible by 100. If the year is also divisible by 400, a leap day is added regardless. So 1900, not a leap year.

4. A leap year isn't actually every 4 years. In the event that the year is divisible by 4 and 100, it is not a leap year, unless it is also divisible by 400.

5. Not every fourth year is a leap year. This does not hold true on leap years that would fall in a year divisible by 100 (aka 2100) with the exception that leap years will be held on years divisible by 400.

6. Leap years occur on years divisible by 4 but never on years divisible by 100 UNLESS that year is also divisible by 400.

7. 1900 and 2100 are not leap years, and so are the years that are divisible by 100 but not by 400.

8. There is a leap year every year whose number is perfectly divisible by four - except for years which are both divisible by 100 and not divisible by 400.

9. In a year there are 365 days, unless the year it's divisible by 4, unless it's also divisible by 100, unless it's also divisible by 400.

10. A leap year does not occur every 100 years unless the year is divisible by 400

What is true about divisible 100?

You can easily fact check it by examining the linked well-known sources.

The British division of Hoover offered a free flight to America for every vacuum cleaner over £100 sold. The promotion cost the company £50 million in court cases after thousands snapped it up

In 1992 Hoover's European division offered customers in the UK two free airlines tickets around Europe and eventually America with any £100 purchase. They were never able to fully live up to the offer, and it eventually lead to the European division being shut down and sold off. - source

Not every year divisible by 4 is a leap year. A leap year is when the year is divisible by 4 or 400 but not by 100.

The Colorado Marijuana Enforcement Division conducted an underage sting operation and reported 100% compliance checks - source

Leap years occur every 4 years EXCEPT when the year is divisible by 100, UNLESS that year is also divisible by 400. So the years 1700, 1800, and 1900 weren't leap years, but 2000 was.

During WW2 a special division of 1,100 Allied troops comprised of actors, painters, carpenters and other artists called the Ghost Army used decoy tactics and misinformation to give the Allies a huge advantage which ultimately helped win the war.

A leap year occurs every 4 years except on years divisible by 100 unless it is also divisible by 400

In 1947 the UK allowed 7,100 Ukrainian men from the 14th Waffen SS 'Galicia' Division to settle in Britain. Their names were never publicly released and attempts to track down war crimes suspects among them have been consistently rebuffed.