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Alex has an infinite number of coconuts nubmered from 1, 2, 3, ...  He colors them either green or red according to a color scheme.  If the coconut's number if a multiple of 3, 5, or 7, it is colored red.  Otherwise, it si colored green.  Find the number of the 100th coocnut colored green.

 Oct 2, 2021
 #1
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Educated guess:  179

 Oct 2, 2021
 #2
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A short computer program gives 218 for the 100'th green coconut.

 Oct 2, 2021
 #3
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That is what I get too....I counted the wrong direction from 200....I should have counted UP.....after I saw your answer, I re-counted and got 218 also

 

Thanx!  Alan     ~EP

ElectricPavlov  Oct 2, 2021

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