Khan/khan-exercises — Issue #14777: Counting 1 - Fence Problem
Author: KhanBugz
Created: 2012-02-27 20:50:46+00:00
State: open
Labels: chrome, win7, wrong-or-unclear

Reporter: rich8722@gmail.com

The question states:
Ashley is building a straight fence, with posts one meter apart. If the fence is 18 meters long, how many fence posts does she need?

The correct answer should be 19, counting the 1 extra to end the fence but the answer states "If the fence is one meter long, she needs two posts, (one for each end).

I believe I am correct and this is just a slight coding error.

[counting_1.html?seed=64&problem=fences](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_1.html?seed=64&problem=fences&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_1.html?seed=64&problem=fences&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%2218%5C%22%5D%22%2C18%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2216%5C%22%5D%22%2C27%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2220%5C%22%5D%22%2C13%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%5D)

[["18"],["16"],["20"]]

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11

MathJax is loaded, ready, queue length: 0