Helping my son with his math homework and he has one problem left that has stumped me. Maybe I'm just thinking in to it to much but here's the question and see how you fare. I've came up with 3 designs but they only use 24 tiles. Using 25 tiles makes the design not a square anymore.
Katrina made a square design with 25 tiles. She used 9 red tiles for the diagonals, 12 yellow tiles to complete the outside border, and 4 blue tiles to complete the center. Show what Katrina’s design looked like.