1. The surface area of a cuboid is 64 square centimeters, the maximum value is 3×64-4×2×4= 160 square centimeters, and the minimum value is 3× 64-4× 4 = 128 square centimeters.

2. The length of rope required to bind a gift box is 25× 2+17× 2+15× 4+22 =166cm, and 1000÷ 166 is about six.