The Mathsbombe Competition

2023 edition. From the people behind the Alan Turing Cryptography Competition.
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Problem 5

There are 100 points given in the plane, and we are asked to draw 2023 straight lines, each of which must pass through at least one of 100 given points. What is the maximum number of points at which two or more lines intersect?

Mathsbombe Competition 2023 is organised by the The Department of Mathematics at The University of Manchester.
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