There are boxes on a trailer, but you only get to see them from the front, side, and back views. Can you figure out how many boxes are on the trailer?
A solid figure is made by stacking several cubical blocks with a side length of 1 cm. The views from the front, the side, and above are shown. What is the volume of the solid?
Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?
There is a thing that if you put in water and get out, put it back for about 2 minutes, you won't see it again. What is it?
