Location & Scenario

Teams drive to bridge over Upper Baker Dam and find box on bridge behind metal pipe.

Puzzle

Boxes made out of ceramic tile and sealed with bathtub caulk. The boxes are sealed with a combination lock, and the tiny paper is inside the lock mechanism. The puzzle above is the combination; you only get it when you smash the box! I stole the grid concept from an old AIME question.

Elapsed Time

Arrive at 4:10
Find puzzle at 4:20
Solve puzzle at 4:35

Hints

Have you read the message in the box yet?
The puzzle is inside the lock.

Answer - 1850

Put "X" in the middle square and generate some equations by extrapolating from that square. The answer is 25X.
Team Orange didn't call for enough hints and drove to Forest Service Road 1850, nearly two hours off course.