Khan/khan-exercises — Issue #12782: Number line 3 - Incorrect answer
Author: KhanBugz
Created: 2012-02-01 04:32:01+00:00
State: open
Labels: chrome, vista, wrong-or-unclear

The problem states ...
"What number is 1 position to the left of the orange dot? The distance between adjacent tick marks is 1."
The orange dot is one tick to the left of -13. We conclude that the answer should be -14. But the program says this is incorrect. When we step all the way through the solution, the final step shows a blue line starting one tick to the right of -13 (-12) pointing left and ending on -15. The orange dot is still in the -14 position.

In an effort to do an exercise that actually worked, we went to Addition 2. We encountered the same thing! We gave it the correct answer and it said "WRONG."

I have used your awesome website for my kids for quite a while and absolutely love it. I can only conclude that the program has gone on strike. :-)

[number_line_3.html?seed=23&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/number_line_3.html?seed=23&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/number_line_3.html?seed=23&problem=0&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7

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