Quilt Block Challenges

With thanks to: https://teacher.desmos.com/activitybuilder/custom/5c2e4696f84a2b491a0e20f0 and https://teacher.desmos.com/activitybuilder/custom/5c585812de3bb6587654c53d as well as https://docs.google.com/document/d/1dtUp5X8VC1Bjhixgt0MEfRSlAKJMrrAurvLI2QJEH0Y/edit

By Katherine Lavine