Khan/khan-exercises — Issue #10389: Counting 1 - I god the good answer or think so but it doesn"t work
Author: KhanBugz
Created: 2012-01-05 09:52:13+00:00
State: open
Labels: chrome, other, win7

Reporter: cremaschi.charlotte@gmail.com

I've got the following problem on counting

William is building a straight fence, with posts one meter apart.

If the fence is 13 meters long, how many fence posts does he need?

I used the hint and came up that
the correct answer is 7. I keyed in but it doesn't work. (May be it is not the right answer but then I wonder what the right answer is)

hint If the fence is one meter long, he needs two posts (one for each end).

There is no video tutorial for this. Do you think there will be some someday?

Thanks for your help and happy new year 2012.

Charlotte

[counting_1.html?seed=108&problem=fences](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_1.html?seed=108&problem=fences&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_1.html?seed=108&problem=fences&debug&activity=%5B%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22incorrect-activity%22%2C%22%5C%222%5C%22%22%2C34%5D%2C%5B%22incorrect-activity%22%2C%22%5C%227%5C%22%22%2C127%5D%2C%5B%22incorrect-activity%22%2C%22%5C%2226%5C%22%22%2C41%5D%5D)

["2","7","26"]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.163 Safari/535.1

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