Grades 3-4 Video Solutions 2020-2020Levels34prob23

Video Transcription

Problem number 23. Which key would it be impossible to cut into three different figures of five shaded squares?  One thing to notice is that in each of these figures, the bottom five pieces will have to be their own shape.  Let's look at some videos where we try to cut the shapes into five separate pieces that are different. We will notice that in figure B, this is impossible.  So all of the figures can be cut into figures of five shaded squares, but B cannot be cut into three figures that are different. So the correct answer is B.

Video Summary

The problem involves determining which figure cannot be divided into three different shapes, each consisting of five shaded squares. Upon examination, it's noted that the bottom five pieces of each shape must be distinct. While all figures can be divided into three different shapes of five shaded squares, figure B cannot be. Therefore, the correct answer is figure B.