If 7 spiders make 7 webs in 7 days, then how many days are needed for 1 spider to make 1 web?

10
7
3
4

Correct Answer: 7

Explanation:

7 spiders make 7 webs in 7 days.
∴ 1 spiders make 7 webs in 7 x 7 days.
∴ 1 spiders make 1 webs in 7 x 7 / 7 days.
∴ 1 spiders make 1 webs in 7 days.

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