a quick math challenge

12272013, 04:43 PM
Post: #5




RE: a quick math challenge
The kids forget it almost immediately. I might teach it to them in 6th grade, and in 7th grade they've forgotten it. They do generally know, however, that all even numbers are divisible by 2.
Regarding adults, I suspect that if you took a manonthestreet poll, you'd probably find fewer than 5% would know the divisibilityby3 rule. 

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