Math Is Fun Forum

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

6 choose 4 in rainbow colors

Here is 6 choose 4 using rainbow colors!  Totally enjoy!

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Last edited by John E. Franklin (2008-04-11 13:02:29)

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igloo myrtilles fourmis

mikau

Member

Registered: 2005-08-22

Posts: 1,504

Re: 6 choose 4 in rainbow colors

i tend to forget what 'x choose y' means, but shouldn't there be more that don't start with orange?

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A logarithm is just a misspelled algorithm.

mathsyperson

Moderator

Registered: 2005-06-22

Posts: 4,900

Re: 6 choose 4 in rainbow colors

Ordering doesn't matter in combinations, so the fact that John's chosen to start lots of the sets with orange is fine. The important part is how many of them contain orange.

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Why did the vector cross the road?
It wanted to be normal.

John E. Franklin

Member

Registered: 2005-08-29

Posts: 3,588

Re: 6 choose 4 in rainbow colors

Select four colors of the rainbow.
Where rainbow has 6 colors:
1. red
2. orange
3. yellow
4. green
5. blue
6. purple
Some rainbows have 2 purples like indigo and violet, but not mine.
I just go with 3 primary colors and 3 secondary colors as
I learned in kindergarten.
By mixing finger paints,
you can start with
red, yellow, and blue,
and end up with
orange, green, and purple,
and also brown if
you mix all 3 together.
Now mixing colored light is
a twisted story from this.
Perhaps if you subtract
the color code from #FFFFFF,
then maybe you could combine
that invert with another invert in
some fashion, and then invert it
to finish, and maybe you could
get the colors on the PC to mix
like ink.  But I don't know the
numerical method.
Maybe you average each R G B
component together if mixing 2
colors equally.  If this is true, then
inverting both averaging and inverting
to the answer is the same as just
averaging the 2 original colors without
inverting.  But by averaging, maybe the
colors won't get way too faded and light
like white, which is what light mixing does.

Last edited by John E. Franklin (2008-04-11 13:30:57)

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igloo myrtilles fourmis