Grades 3-4 Video Solutions 2024-2024_3-4

Video Transcription

Question 11. Ada built a tower of 8 disks, as in the picture. Ada removes the 2nd disk from the bottom of this tower. Then she removes the 3rd disk from the bottom of the new tower.  Then she removes the 4th disk from the bottom of that new tower. Then she removes the 5th disk from the bottom of the new tower. What tower does Ada end up with?  First, let's draw the tower as such. Now, we will remove the 2nd disk from the bottom, which will be this white one. This is the new resulting tower.  Next, we remove the 3rd disk from the bottom, which is this one, and the tower looks as such. Now we will remove the 4th disk, this one, and we end up with this tower.  Finally, we remove the 5th disk from the bottom, which is actually the top disk, and end up with this tower. From the top, it is blue, white, orange, blue,  which we see as an answer, which will be B.

Video Summary

Ada starts with a tower of 8 disks and sequentially removes specific disks according to the following steps: she first removes the 2nd disk from the bottom, then the 3rd from the new bottom, the 4th from the next new bottom, and finally the 5th from the last new configuration. The process results in a tower comprising from the top: blue, white, orange, blue. The final tower configuration is option B.

Keywords

tower of disks

disk removal

tower configuration

Ada

final configuration