2. Measuring Mug🔗

Without the aid of any measuring device, how can you use a transparent 16-ounce mug to measure a volume of water that is exactly 8-ounces?

3. Meet Me on the Edge

Did you know that an ant can lift about fifty times its body weight? If you had that power, you'd be able to lift 2 tons! Suppose we position one of those powerful ants on a corner of a sugar cube. On the opposite corner, we position a fly. Suppose the two insects begin walking towards each other. If they can only walk along the edge of the cube (and never go backwards), what is the probability that their paths will cross?

4. Don't Come Back This Way Again

The pitcher plant is a carnivorous plant that eats insects. An unfortunate insect walks in to the pitcher plant's flower. When it tries to reverse direction, it can't. Tiny spines on the petals' surface face downward, which forces the insect to move in one directiondown. Here's your chance not to go back. The shape below is made with one continuous line. Starting anywhere, can you complete the shape without lifting your pencil from the page? As you probably quessed, your path cannot cross over itself.

5. Pack up your troubles.

A fragile item is to be shipped in a cardboard box. In order to prevent the item from hitting against the walls of the box, plastic foam cubes are used as "bumpers." There are ten of these cubes. How can you position them along the inner walls of the box so that there is an eqaual number of the cubes along each wall?