I made this as a summative task for my small MFM1P class. Since my class is small, students can work in pairs on one sheet, then try a second independently. (Larger classes could make two pumpkins and have a colouring contest :) These whole-class colouring mosaics are quite engaging, and a good way to get even the most reluctant students to complete their homework (since the success of the picture hinges on each individual's contribution!).
It's simple!
1. Calculate the answers.
2. Colour