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I run a hiking club with n people, not including myself. Every day, for 365 days, I invite four members in the club to go on a hike with me. What is the smallest positive integer n so that I can avoid having the same group of four members over all 365 days?
 

 Jan 18, 2020
 #1
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The minimum n is 15.

 Jan 18, 2020
 #2
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12 c 4 = 495          11 c 4 = 330

 

You will need 12

 Jan 18, 2020

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