From the condition, the numbers are 2x, 3x and 7x, where x is the common measure of these numbers. The value of x is unknown now, but can be easily foynd from the equation for the total 2x + 3x + 7x = 360, 12x = 360, x = 360/12 = 30. Then the difference between the largest and the smallest numbers is 7x - 2x = 5x = 5*30 = 150. ANSWER