Khan/khan-exercises — Issue #9024: Least common multiple and greatest common divisor word problems - The answer to this question is sometimes incorrect
Author: KhanBugz
Created: 2011-12-19 21:52:31+00:00
State: open
Labels: chrome, other, win7

Reporter: chrismray@gmail.com

The answer to this question is intended to be the least common multiple of two of the numbers in the problem. However, the least common multiple is NOT always the right answer given the way this question is worded. For example, in an earlier iteration of this question, the person wanted to create office supplies for her coworkers consisting of at least one glue stick and one crayon. Glue sticks came in packages of 10 and crayons in packages of 15. The question wanted to know how many office supplies could she make for her coworkers if she only wanted to buy one package of each. The actual answer is 10, but since the least common multiple of 10 and 15 is 5, the expected answer was 5. In other words, the answer to this question is not equal to the least common multiple but is instead equal to the lessor of the two values.

[least_common_multiple_and_greatest_common_divisor_word_problems.html?seed=192&problem=gcd-office-supplies](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/least_common_multiple_and_greatest_common_divisor_word_problems.html?seed=192&problem=gcd-office-supplies&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/least_common_multiple_and_greatest_common_divisor_word_problems.html?seed=192&problem=gcd-office-supplies&debug&activity=%5B%5B%22correct-activity%22%2C%22%5C%222%5C%22%22%2C105%5D%5D)

["2"]

Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2

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