What types of problems can be solved using the greatest common factor

The cost c, in dollars, for bananas depends on the weight w,in pounds, of the bananas. this situation is represented by the function rule c=0.5w (graph each function rule.tell whether the graph is continuous or discrete)

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25