Determine a cuboid with minimal surface area, if its volume is strictly greater than 1000, and the lengths of its sides are integer numbers.
One possibility is a rectangular cuboid with sides of 10, 10 and 11. This has a volume of 1100 and surface area of 4*110+2*100 = 640.
If this is not an answer, then the correct answer must have a surface area of less than or equal to 640.