Khan/khan-exercises — Issue #13174: Counting 2 - Counting 2 Error?
Author: KhanBugz
Created: 2012-02-06 18:15:59+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: mr.lerie@gmail.com

Hello, again, it's me, the one not so good in math. The problem says..

Jessica starts counting at 44, and she counts by threes.

If 44 is the 1st number that Jessica counts. what is the 15th number that she counts?

What is the first number that she counts?

44

What is the second number that she counts?

44+3=47

What is the third number that she counts?

44+3+3=44+(2×3)=50
----
I fail to see if she is counting by 3's and needs to do it 15 times, how does it come out to 50? Shouldnt it be....

44+3+3+3+3+3+3+3+3+3+3+3+3+3+3+3 = 89

[counting_2.html?seed=186&problem=every-n](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_2.html?seed=186&problem=every-n&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/counting_2.html?seed=186&problem=every-n&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2289%5C%22%22%2C38%5D%2C%5B%22hint-activity%22%2C%220%22%2C2%5D%2C%5B%22hint-activity%22%2C%220%22%2C4%5D%2C%5B%22hint-activity%22%2C%220%22%2C5%5D%2C%5B%22hint-activity%22%2C%220%22%2C6%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C10%5D%5D)

["89"]

Mozilla/5.0 (Windows NT 6.1; rv:10.0) Gecko/20100101 Firefox/10.0

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