If 5 spiders make 5 webs in 5 days, then 1 spider will make 1 web in how many days?  Select the correct option
A) 7
B) 6
C) 5
D) 4
E) 3
Let the required number days be x.   Less spiders, More days (Indirect Proportion)   Less webs, Less days (Direct Proportion)   spiders 1:5   Webs 5:1   1 x 5 x x = 5 x 1 x 5   =&gt; x= 5   Answer is 5
<result>C</result>
If 5 spiders make 5 webs in 5 days, then 1 spider will make 1 web in how many days?