Solve integer equations, determine remainders of powers, and much more with the power of Modular Arithmetic.
How many days after January 13th is February 13th?
Note: January has 31 days.
If January 13 is a Monday, what day of the week is February 13?
If May 13 is a Friday, what day of the week (during the same year) is April 13?
If a non-leap year begins on a Monday, will it have a Friday the 13th?
If July 13 is a Friday, is August 13 a Friday?