1.At a dinner party, 5 people are to be seated around a circular table. Tow seating arrangement are considered different only when the position of the people are different relative to each other. What is the total number of different possible seating arrangement for the group?
A.5 B.10 C.24 D.32 E.120 答案是C
2.For every positive even integer n, the function f(n) is defined to be the product of all the even integers from 2 to n, inclusive. If p is the smallest prime factor of h(100)+1, then p is
A. between 2 and 10 B. between 10 and 20 C. between 20 and 30
D. between 30 and 40 E. greater than 40 答案是E
1.At a dinner party, 5 people are to be seated around a circular table. Tow seating arrangement are considered different only when the position of the people are different relative to each other. What is the total number of different possible seating arrangement for the group?
A.5 B.10 C.24 D.32 E.120 答案是C
圓形排列，可視為直線排列少一項。這個例子中就取p（4,4)=4! 答案即26
2.For every positive even integer n, the function f(n) is defined to be the product of all the even integers from 2 to n, inclusive. If p is the smallest prime factor of h(100)+1, then p is
A. between 2 and 10 B. between 10 and 20 C. between 20 and 30
D. between 30 and 40 E. greater than 40 答案是E
