This formative explores how the Gregorian calendar works and examines the probability of Friday the 13th appearing in a year. Students will learn about calendar design, mathematical probability, and patterns.
How often does Friday the 13th occur on average each year?
Which factors influence the occurrence of Friday the 13th? (Select all that apply)
What is the maximum number of Friday the 13ths possible in one year?
The first day of the year determines the distribution of Friday the 13th throughout the year.