Grades:

Friday 13th

Are you spooked by Friday the 13th? How many of these cryptic Friday’s are possible in one year?

Reference

The NRICH website publishes free mathematics resources designed to challenge, engage and develop the mathematical thinking of students aged 5 to 19. NRICH also offers support for teachers by publishing Teachers’ Resources for use in the classroom.

This task can be found at: https://nrich.maths.org/610