************************************* MathMagic Cycle 11: Level 7-9 Regular ************************************* I received a magazine that accidentally hadn't been stapled, and when I took it out of the envelope, out came pages 6 and 19 as a double sheet. Since some friends were laughing at my magazine, I told them I was able to predict not only what other pages were on the sheet I had in my hand, but exactly how many pages the magazine had. What did I have to do to in order to be correct? By working several different pages, can you develop a way of telling regardless of the number of pages? ************************************** MathMagic Cycle 11: Level 7-9 Advanced ************************************** ( ) Crossed Z Hexagon: / | \ ( )--+--( ) Try placing the numbers 1 to 6 in the vertices of | | /| of the hexagon, so that consecutive numbers (2 and | | / | 3 or 5 and 6) are NOT joined by a line. | |/ | | * | How many ways of placing the numbers are there? | /| | | / | | If the vertical center line wasn't there, how many ( )--+--( ) arrangements would be possible? \ | / ( ) ================== Good luck