Groups of change with totals from 1 to 100 cents using the least amount of coins.

Illustration of 20 congruent cubes stacked at heights increasing from 1 to 4 cubes. A 3-dimensional…

Illustration of 65 congruent cubes stacked at heights increasing from 1 to 5 cubes. A 3-dimensional…

An isosceles triangle with angles 50, 65, 65

An isosceles triangle with angles 65, 57.5, 57.5