One snail is near the bottom of a 35 meters deep well. Each day the snail goes up 7m up, but at night, it slides 4m back down.
How many days it takes before the poor snail reaches the top of the well?
Read next
From @xardas
One snail is near the bottom of a 35 meters deep well. Each day the snail goes up 7m up, but at night, it slides 4m back down.
How many days it takes before the poor snail reaches the top of the well?