5 cats can catch 5 mice in 5 minutes. How many cats does it take to catch 100 mice in 100 minutes?  Pick.
A) 1 B) 2 C) 3 D) 4 E) 5
let x be no. of cat   5 cat catch 5 mice in 5 min   5 cat catch 1 mice in (5/5=1 min)   1 cat catch 1 mice in 1*5= 
<gadget id="calculator">1*5</gadget>
<output>5</output>
5 min   1 cat catch 100 mice in 5*100 min   x cat catch 100 mice in (5*100)/x min   A/Q (5*100)/x= 100   =&gt; 5*100=x*100   =&gt; x=5   ANSW5R:5
<result>E</result>
5 cats can catch 5 mice in 5 minutes. How many cats does it take to catch 100 mice in 100 minutes?