Q1: If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?

ANS:C - 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 x 7 x x = 7 x 1 x 7  x = 7.