Grades 9-10 Video Solutions 2025-2025_9-10

Video Transcription

Video Summary

David wants to place the numbers 1 to 8 in the diagram without consecutive numbers sharing a side or vertex. The central cells, due to their multiple connections, must contain numbers that can only have one consecutive number: 1 and 8. Depending on the placement of 1 or 8 in the top central cell, the consecutive number, 2 or 7 respectively, must be placed in the cell marked X. Therefore, the possibilities for the number in cell X are 2 and 7. Thus, the answer is that 2 and 7 can be placed in the cell marked X.

Keywords

number placement

consecutive numbers

diagram puzzle

central cells

cell X