Challenge Page

I used square tiles to completely cover a rectangular surface of 81 cm x 72 cm. What is the length of the side of the smallest tile used? Send us an email with the answer*. Win a prize! * This challenge is open to all students under age 14. Students who answer correctly will be notified by email. They will have to visit the Kumon center at Mansfield during Center hours to pick a prize. No purchase or enrollment necessary to participate and win.