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This website [1] claims:
A year is known as 365 days, but the earth actually takes 365.25 days to orbit the sun. This is why we had to come up with a leap year every 4 years, to account for the extra .25 that is otherwise not accounted for. Most people are aware of that, but did you know that once every 400 years we also do another leap year in addition? This is because the earth rotates around the sun a little over 365.25 times, just a fraction if you will. We compensate that by having another leap year every 400 years.
A claim frequently encountered is that when Julius Caesar reformed the calendar he gave the odd months 31 days and the even ones thirty and that when Caesar Augustus reformed it he jealously swiped a day from February, added it to Augustus so that his month would be as long as Julius', and then rearranged the lengths of September onwards so that there would not be three successive months of 31 days. How knowledgeable are people about the way the calendar actually works? 86.137.87.214 ( talk) 14:13, 9 April 2017 (UTC)
Every year which when divided by 900 leaves a remainder of 200 or 600 is a leap year. ...
However, this rule is not official in Greece.
Wrong (notwithstanding the emphasis). This website doesn't have a contact form but it does say here [3] that the writer can be emailed. As I don't have email can someone pass on the information? 86.137.87.214 ( talk) 10:22, 10 April 2017 (UTC)
Most sources I've read say (including Wikipedia) say a polyomino must be made out of squares and that a polyform is a more general term. However, this source:
uses "polyomino" to mean any polyform. It says that the definition of a polyiamond is a triangular polyomino. Any thoughts here?? Georgia guy ( talk) 18:42, 9 April 2017 (UTC)
Mathematics desk | ||
---|---|---|
< April 8 | << Mar | April | May >> | April 10 > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
This website [1] claims:
A year is known as 365 days, but the earth actually takes 365.25 days to orbit the sun. This is why we had to come up with a leap year every 4 years, to account for the extra .25 that is otherwise not accounted for. Most people are aware of that, but did you know that once every 400 years we also do another leap year in addition? This is because the earth rotates around the sun a little over 365.25 times, just a fraction if you will. We compensate that by having another leap year every 400 years.
A claim frequently encountered is that when Julius Caesar reformed the calendar he gave the odd months 31 days and the even ones thirty and that when Caesar Augustus reformed it he jealously swiped a day from February, added it to Augustus so that his month would be as long as Julius', and then rearranged the lengths of September onwards so that there would not be three successive months of 31 days. How knowledgeable are people about the way the calendar actually works? 86.137.87.214 ( talk) 14:13, 9 April 2017 (UTC)
Every year which when divided by 900 leaves a remainder of 200 or 600 is a leap year. ...
However, this rule is not official in Greece.
Wrong (notwithstanding the emphasis). This website doesn't have a contact form but it does say here [3] that the writer can be emailed. As I don't have email can someone pass on the information? 86.137.87.214 ( talk) 10:22, 10 April 2017 (UTC)
Most sources I've read say (including Wikipedia) say a polyomino must be made out of squares and that a polyform is a more general term. However, this source:
uses "polyomino" to mean any polyform. It says that the definition of a polyiamond is a triangular polyomino. Any thoughts here?? Georgia guy ( talk) 18:42, 9 April 2017 (UTC)