If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days? Choose the correct option
A) 6
B) 1
C) 3
D) 9
E) 7
Let the required number days be x.   Less spiders, More days (Indirect Proportion)   Less webs, Less days (Direct Proportion)   Spiders	1	:	7 :: 7 : x   Webs	7	:	1   :. 1 * 7 * x = 7 * 1 * 7   x = 7.   Answer is 7.
<result>E</result>
If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?