GMAT 考满分题库

Magoosh - 数学PS - 248
How many three-digit numbers are there such that all three digits are different and the first digit is not zero?
  • A504
  • B648
  • C720
  • D729
  • E810
显示答案
正确答案: B

讨论题目 或 发起提问

|

题目讨论

  • 按热度
  • 按顺序

最新提问