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

The worm will take 10 days to get to the top of the wall.

Step-by-step explanation:

Worm is at the bottom of a 12 foot wall.

Worm crawls up the distance = 3 feet per day

and slips down the distance = 2 feet per day

Everyday it crawls up by the distance = 3 - 2 = 1 feet

Time taken to crawl up to the height 9 feet = 9 days [ Since it crawls up 1 feet per day]

Remaining distance after 9 days = 12 - 9 = 3 feet

Now on the 10th day worm will crawl up by 3 feet of the distance remaining.

Hence the worm will take 10 days to get to the top of the wall.

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step-by-step explanation: