请教数学题2

shirleywang

题号和cd gwd 不同

gwd10  30题

  If n is a positive integer, what is the value of the hundreds digit of 30^n?

  1) 30^n >1000

  2) n is a multiple of 3

key A

  gwd 37

In a meeting of 3 representatives from each of 6 different companies, each person shook hands with every person not from his or her own company. If the representatives did not shake hands with people from their own company, how many handshakes took place?

  key 35

啊！！不会

10题

Is |x|<1?

1) |X+1|=2|x-1|

2) |x-3|不等于0

11 题

The product of the units digit, the tens digit, and the hundres digit of the positvie integer m is 96, what is the units digit of m?

1) m is odd

2) The numbers digit of m is 8

多谢大家

shirleywang

hundreds digit  是百位

tens digit 是十位

unit digit 是个位