One good Math / Logic question: Let's see Who can answer this and how fast.... Q. There is a big pond, in this pond there is a Lotus flower. Each day this flower multiplis by bouble. FX: Day 1 = 1 lotus Day 2 = 2 Lotus Day 3 = 4 Lotus Day 5 = 8 Lotus Day 6 = 16 Lotus... And so on. This pond is full with lotus after 40 days. When is this pond half full??