prep模考 求助三道题

tt3tt

1.which of the following lists the number of points at which a circle can intersect a triangle
A 2and 6（题目意思没看懂）
B2,4,6
C1,2,3,6
D1,2,3,4,6
E1,2,3,4,5,6

2.For any positive integer n, the length of n is defined as the number of prime factors whose product is n .eg.the length of 75 is 3  75=3x5x5
问两位数有多少个长度是6的（我算出来只有一个呀2x2x2x2x2x3=96）
A none
B 1
C 2
D 3
E 4

3.ds 问n是不是奇数
1)n被3整除
2）2n is divisible by twice as many positive integer as n  这是什么意思

tt3tt

是的，，，，我白痴

rectina1011

第二题是不是选C呀？
LZ可以再添加一个：2*2*2*2*2*2=64
也是两位数哦~

tt3tt

upup

tt3tt

3q~~2.3题会嘛

sasazan

应该是一个圆和一个三角形会有几个交点？ 选E