Maya Empire for Kids
and Maya Calendars
NUMBERS: The Maya invented the concept of zero. This concept and understanding of mathematics was very advanced for its time. The Maya number system was based on 20. How do you think the ancient Mayas would have written the number 40? (Look at the number chart below, then look at the bottom of this page to check your answer.)
CALENDAR: The Maya also invented an accurate calendar using their knowledge of astronomy and mathematics.
Answer: 40 would be two dots (20+20) over zero.