Now solve this riddle! A field has a small patch of mushrooms and every day the patch grows to double its size. It takes 32 days for the patch to cover the field. How long would it take the patch to cover half the field?
This would be useful in any universe: Sleekeazy’s Hair Potion and Scalp Treatment is a hair care potion and scalp treatment originally sold with the slogan: “Two drops tames ever the most bothersome barnet”. Tracking down its ingredients Gomas Barbadensis, Asian Dragon Hair and Petroleum Jelly might be more difficult.