Students will be shading in sections of a design that contain numbers which are multiples of 2, 3, and 5.
Students will be most successful if they start by shading in multiples of 5 (numbers that end in 0 or 5), then shade in multiples of 2 (numbers that end in 2, 4, 6, 8, or 0), and complete by shading in multiples of 3. Multiples of 3 can end with any digit, but will have digits that add up to 3, 6, or 9.
The completed image appears on the page "upside-down". This will make it so some students won't "see" the picture until they are done and waving it in your face.
Additionally, when done correctly it will appear to have one space colored in that appears to be a mistake. This will assure that students aren't just taking a short-cut if they do see the image before checking every number.