Solution: Ten to Twenty
The puzzle last time was Ten to Twenty. In it, students were challenged to place ten pennies in five rows, each with four pennies. One possible solution follows. (If you stack pennies, several other solutions are possible.)

The puzzle last time was Ten to Twenty. In it, students were challenged to place ten pennies in five rows, each with four pennies. One possible solution follows. (If you stack pennies, several other solutions are possible.)
