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| Math Central | Quandaries & Queries |
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Subject: odd numbers can 4 odd numbers equal 21? i was given this pig pen problem. if there are 21 pigs and only 4 pig pens how can you distribute the pigs into the pens and have an odd number of pigs in each pen. |
Hi Emma,
You're right, you can't add four odd numbers to get 21. There is a trick to this problem. Normally four pig pens would be in four separate locations. Can you think of an alternative way of placing the pens that would solve the problem?
-Haley
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