







4 couples seating themselves at a round table 
20090904 

Hui pose la question : Q: 4 couples seating themselves at a round table. Men must seat together and women seat together. How many ways are there? Answer in the printed text is 576. I got 144. Pls advice. Claude Tardif lui répond. 





Seating around a circular table 
20090209 

Jenny pose la question : A committee of 15  9 women and 6 men  is to be seated at a circular table (with 15 seats). In how many ways can the seats be assigned so that no two men are seated next to each other? Victoria West lui répond. 





Circular Permutations 
20000918 

J. Stuart pose la question : I am able to understand the simple theory behind circular permutations (that is, there are (n1)! ways to arrange n people in a circle. One question, however, is giving me some difficulty. It reads: In how many ways can four married couples be arranged around a circular table if each man must sit beside his wife? Any suggestions you have would be greatly appreaciated. Penny Nom lui répond. 





Trolls and Gargoyles 
19991102 

TexGrimm pose la question : How can you seat 6 monsters  3 Trolls and 3 Gargoyles at a circular table if the trolls look alike and the gargoyles look alike? Does your formula work for 9 monsters  4 trolls and 5 gargoyles? Penny Nom lui répond. 





Circular Permutations 
19970205 

Ed Varjassy pose la question : I have an understanding of simple problems involving circular permutations but do not understand them when they start to have restrictions. Is there any advice you can give for these more complicated permutations. Penny Nom lui répond. 

