2. 职称英语
  3. A set of dominoes (多米诺) consists of rectangular (矩形的) tiles each carrying two nu

A set of dominoes (多米诺) consists of rectangular (矩形的) tiles each carrying two nu

游客2023-10-17  30
问题 A set of dominoes (多米诺) consists of rectangular (矩形的) tiles each carrying two numbers from 0 to 6 which represented by patterns of spot. Every possible pairing of numbers occurs just once, including each number with itself.
How many dominoes are there in a set?
选项
答案 28
解析
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