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I have a circular necklace with 18  beads on it. All the beads are different. Making two cuts with a pair of scissors, I can divide the necklace into two strings of beads. If I want each string to have at least  6 beads, how many different pairs of strings can I make?

 May 7, 2020
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There are four types we can make

 

The solution will be the sum these values: 18+18+18+9=63

 

coolsmileycool

 May 7, 2020

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