Open Question is the 113th level in Chip's Challenge 1. The level's name and the (slightly misspelled) hint suggest that the 8th "block" is open. By searching slightly, Chip can determine that this means the eighth blue wall from the left side. Also note that Chip can touch the hint, although it is [2] out of the way, and still reach the 462.8 route because he has to wait [2] for the cloning fireballs.