Fifty Factors Mystery Cache

This one is placed for EagleEye's 50th birthday. The cache is on our property. Parking is available at the bottom of the driveway. This is a puzzle cache, where basic math may be required... + or / or * or % or x or ± or -. There will be no need to use force to open or maneuver any portion of the box, which is inside a plastic box, to enhance weather survivability. During the winter, snowshoes may be needed. MUST sign the log to get credit. :)

The container is a box large enough for small TBs, and was inspired by a fellow crafty cacher of local repute :) About a week before placing this one, I woke up at about 3:30am, with this idea racing through my head. After trying to fall back to sleep for about 45 minutes, I decided to sketch out a plan for this container. After an hour and a half of sketching, I was able to fall back to sleep. The next morning I gathering the required supplies, and started construction. The morning of my birthday, I snowshoed to the coordinates to get an accurate reading for the posting, sinking about 1 1/2 feet in the snow. A little later, I walked back to the coordinates without the snowshoes, and sunk an additional 2 feet in places. This should be available all year around. There is a nice FTF incentive. :-)