On 8/20/20 5:00 PM, Gregg Eshelman via Emc-users wrote:
What blows some people's minds is that the sum of two odd numbers is always an
even number, the sum of two even numbers is also always an even number. The
only way to get an odd number from adding any two numbers is one number must be
odd.
That's a math feature often used in number collecting games where the object is
to add up to an odd number like 21. The number of winners is easy to control by
how many game pieces with an odd number are released. Get any odd number and
you're a winner because it's super easy to collect the right even numbers to
add together. Pepsi did that years ago where if you collected bottle caps
totaling 21 they'd get you a pair of tickets to ANY event in the USA. Super
Bowl, some big gaming convention, whatever.
On Thursday, August 20, 2020, 12:48:51 AM MDT, Chris Albertson
<[email protected]> wrote:
What happens is these concepts get beaten into your brain so well that we
think we never learned them and it is just "common sense". Not no it is
not common sense, the smartest people who ever lived spent much of their
life figuring out something in the mid 1600's and you learned it in 10
minutes and then forgot when. But now it is dead-obvious that every whole
number is the product of a unique set of primes. How could that NOT be
true?
So we are prone to say "It is obvious that..."
But then again no one is born knowing this and for most of human history,
no one knew this obvious fact. But it becomes obvious after we forget
where we learned it.
Since we are obviously OT I will compound it. One of the tests for
dementia is a count backwards from 100 by 7's. My wife does it in a
subtract 3 , subtract 4 sequence. " I think it is obvious that"... the
easy way to to subtract 10 add three. People are different in their
approach to problem solving and that is what make them so 'interesting'. :-)
Dave
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