9 Mystery Pictures with 27 Color by Code / Color By Number Math Worksheets. Each worksheet includes 10 unique problems. All pictures have a colored answer key. Find the surface area & volume of the following figures. Color By Answer. Examples: The length, width, height of a cuboid are: 8cm, 6cm, 2cm. Surface area = ? Answer: 152 cm2 The length, width, height of a cuboid are: 3cm, 7cm, 9cm. Volume = ? Answer: 189 cm3 Please CLICK HERE to view other Math Mystery Picture products