Winners of the square challengr
Congratulations to Julian, Luca, Akira, William, Oliver, and Andrew of the 3rd grade, and Rania of the 7th grade for finding the solution. See Rania's solution below.
Congratulations to Julian, Luca, Akira, William, Oliver, and Andrew of the 3rd grade, and Rania of the 7th grade for finding the solution. See Rania's solution below.