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

Illustration of 35 congruent cubes stacked in ones and twos in the shape of a W. A 3-dimensional representation…

Illustration of 35 congruent cubes stacked at various heights. A 3-dimensional representation on a 2-dimensional…

An isosceles triangle with angles 110, 35, 35

An isosceles triangle with angles 35, 72.5, 72.5