The average for three dice is 10.5. The sum of the values on one die is 21, which is divided by 6… ...
8 squared, 8² = 8 × 8, is 64. 64 is a square number. Image caption, A square number can be shown on a grid. 9 is a square number. 9 tiles can be arranged into a 3 × 3 square. 16 is a square number.