Three numbers are in the ratio 3:5:7. The largest number is 56. What is the difference between smallest and largest number? Choose the correct choice from the following
A) 20  B) 24  C) 28  D) 32  E) 36
The three numbers are 3x, 5x, and 7x.   The largest number is 56 = 7*8, so x = 8.   The smallest number is   3*8= 
<gadget id="calculator">  3*8</gadget>
<output>24</output>
24.   56 - 24= 
<gadget id="calculator">56 - 24</gadget>
<output>32</output>
32   The answer is 32.
<result>D</result>
Three numbers are in the ratio 3:5:7. The largest number is 56. What is the difference between smallest and largest number?