A number whose fifth part increased by 5 is equal to its fourth part diminished by 5, is  Choose one:  A) 160  B) 180  C) 200  D) 220  E) None of these
x/5 + 5 = x/4 - 5   =&gt; x/5 - x/4 = 10   x/20 = 10   =&gt; x = 200   Answer: 200.
<result>C</result>
A number whose fifth part increased by 5 is equal to its fourth part diminished by 5, is