## Sorry! + an unsolved conjecture = this printable math board game

When did you learn that there are still unsolved problems in mathematics?

Do you have a favorite unsolved problem?

For me, it’s a close tie among…

When did you learn that there are still unsolved problems in mathematics?

Do you have a favorite unsolved problem?

For me, it’s a close tie among…

The goal of Yodoku is to place consecutive integers 1, 2, 3, … so that the numbers in each row and the numbers in each column are always increasing. This means…