A gallon of paint will cover approximately 350 square feet and artist wants to paint all the outside surfaces of a cube measuring 10 feet on each edge what is the least number of gallons of paint he must buy to paint the cube?

Assuming that the artist wants to paint 6 sides of the cube, the formula to count the surface area of the cube would be: 6 * edge length^2. If the edge length is 10 feet, then the area would be:

area = 6*edge length^2

area = 6 * 10^2 feet

area = 6*100feet^2 = 600 feet^2

If one gallon of paint can be used for 350 feet^2, the amount of paint needed would be: 600feet^2 / (350ft^2 / gallon) = 1.71 gallon