# math

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A worm is at the bottom of a 12- foot wall. Every day it crawls up 3 feet, but at night it slips down 2 feet. How many days does it take the worm to reach the top of the wall?

• math -

It rises a net distance of 1 feet per day. After nine days it has risen nine feet. What happens on the tenth day?

• math -

Eleven days.

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