In front of you are three light switches. Only one does anything, and it turns on the light downstairs. From where you are standing, you can’t see the downstairs light, and it makes no sound. You must determine which switch operates the light, BUT you can only go check it once. How do you figure out which switch is for the light?
You have 1,000 bottles of juice. One contains poison and tastes bitter. How do you find the poisoned bottle using the smallest number of sips?
This object has holes in its top and bottom. It also has holes on its sides and bottom. Not only that, it is riddled with holes in the middle. Despite this, it can still hold water. What is it?