The difference between a number and its three fifth is 50. What is the number? Choose the most appropriate option:
A) 75	B) 100	C) 125	D) 175	E) 187
Sol.   Let the numbers be x.   Then, x-3/5x = 50   ⇔2/5x = 50⇔ x = (50x5/2) = 125.   Answer 125
<result>C</result>
The difference between a number and its three fifth is 50. What is the number?