TNB: DR's Crazy Brain Puzzle. Get It Correct or Else.
You want to climb as high as possible on that rope, and lower only twice. You will climb to a high anchor, then lower to a second (lower) anchor where you will clip in and pull the rope through the top anchor, and then have your belayer lower you again. How far off the ground should the highest anchor be, and how far off the ground should the lower anchor be?