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Combinatorics - Pigeonhole Principle (Arabic)
Please visit for math problem solving classes. we solve this problem using the Pigeonhole Principle and Modular Arithmetic.
Pigeonhole Principle Problem 3 -- Divisibility and Modular Arithmetic
A simple principle with immense use in mathematical reasoning. Some simple problems then a slightly more involved problem explained using Geogebra.
Pigeonhole principle with sample problems in Geogebra