If 5 spiders make 5 webs in 5 days, then 1 spider will make 1 web in how many days?	Choose the most appropriate option:
A) 7
B) 6
C) 5
D) 4
E) 3

Rationale: "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 = > x = 5 answer is c"
Answer: C