Distance Learning Math! Free Online / Digital Math Mystery Pictures. Features of using Digital Math Mystery Picture: - Automatic Coloring - Self Checking - Digital - Time-Saving - Fun! This product contains a pdf with the links to access your web-based product. How to share it with students:1) Free version.You can share this without making a MathMysteryPictures.com account because it is a free demo, but you will not get any statistics about students progress. 2) Paid version (14-days trial ve