If 8 workers can build 8 cars in 8 days, then how many days would it take 5 workers to build 5 cars?
Choose the correct answer
A) 4
B) 5
C) 8
D) 10
E) 12
8 workers can build 1 car per day on average.   1 worker can build 1/8 of a car per day.   5 workers can build 5/8 car per day.   The time required to build 5 cars is 5 / (5/8)= 
<gadget id="calculator">5 / (5/8)</gadget>
<output>8</output>
8 days   The answer is 8.
<result>C</result>
If 8 workers can build 8 cars in 8 days, then how many days would it take 5 workers to build 5 cars?