Framingham Pi

Randy Weiss puts another constant on the board for Massachusetts! This sign confounded him for a while searching for some mathematical relationship, and then it dawned on him that it contained the somewhat common 22/7 combination.



By far the most common approximation of Pi is done again.

$${ { 12 + 9 + 1} \over 7 } \approx \pi$$

This sign is on eastbound I-90, Mass Pike at exit 12.