Khan/khan-exercises — Issue #9535: Least common multiple and greatest common divisor word problems - Least Common multiple and greatest common divisor word problems
Author: KhanBugz
Created: 2011-12-26 12:45:23+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Reporter: jjdebeer@bigpond.com

One of the practice questions reads as follows: there are 12 sprinters and 40 long distance runners. All teams need to have the same number of sprinters and same number of long distance runners. What is the greatest number of teams that can be formed? The solution givenuses the dreatest common divisor and has an answer of 4. I believe this is incorrect - one should use the smallest common divisor (1) which gives you an answer of 12 teams, with 1 sprinter and 3 long distance runners each.

[least_common_multiple_and_greatest_common_divisor_word_problems.html?seed=67&problem=gcd-teams](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/least_common_multiple_and_greatest_common_divisor_word_problems.html?seed=67&problem=gcd-teams&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/least_common_multiple_and_greatest_common_divisor_word_problems.html?seed=67&problem=gcd-teams&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%2212%5C%22%22%2C35%5D%2C%5B%22hint-activity%22%2C%220%22%2C31%5D%2C%5B%22hint-activity%22%2C%220%22%2C46%5D%2C%5B%22hint-activity%22%2C%220%22%2C56%5D%2C%5B%22hint-activity%22%2C%220%22%2C62%5D%2C%5B%22hint-activity%22%2C%220%22%2C86%5D%2C%5B%22hint-activity%22%2C%220%22%2C90%5D%5D)

["12"]

Mozilla/5.0 (Windows NT 6.1; rv:8.0) Gecko/20100101 Firefox/8.0

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