1. Mesoamerican Mathematics and Calendrics Tim Roufs University of Minnesota Duluth

2. Cuello, Belize

3. 5 5 5 1 1 1 1 14

4. Cuello, Belize

5. Understanding Physical Anthropology and Archaeology, 8th ed., p. 487. Maya Mathematics 5 5 1 1 1 1 14

6. Understanding Physical Anthropology and Archaeology, 8th ed., p. 487. Maya Mathematics

7. Understanding Physical Anthropology and Archaeology, 8th ed., p. 487. Maya Mathematics

23. Mathematics Gregorian Calendar followed the Julian Calendar which had been used 800 years in 1582 Pope Gregory XIII declared that the following October 4 th should be October 15 th he also provided that leap years should be skipped in centesimal years, except when they are divisible by 4 thus, there were no leap years in 1700, 1800, 1900, but there was one in 2000

24. Mathematics

33. Duluth Herald Tribune Saturday, February 1, 2003, p. 2A

39. End of Mathematics and Calendrics