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11:30 AM
6
Q: When is the number of areas obtained by cutting a circle with $n$ chords a power of $2$?

Maximilian JanischIntroduction Recently, a friend told me about the following interesting fact: Place $n$ points on a circle and draw a line between every pair of points. Suppose that no three lines intersect at one point. Then the number of regions which are separated by the lines is equal to the sum of the ...

@Haran ^^ The challenge is to show that $1+\binom n2+\binom n4$ is never a power of two for $n>10$.
 
 
1 hour later…
12:37 PM
Ah I see. Will try!
 
 
5 hours later…
6:01 PM
Hi @â„‹olo
 

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