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回復 smallfoothk 的帖子
I can answer question 1.
For those numbers which can be divided only by 1 and themselves are called "Prime Number", for example,
2 - factors are 1 and 2;
3 - factors are 1 and 3;
5 - factors are 1 and 5;
7 - factors are 1 and 7 and so on.
For those numbers which are even or can be divided not only by 1 and themselves are called "Composite Number", for example,
4 - factors are 1, 2 and 4;
6 - factors are 1, 2, 3 and 6;
8 - factors are 1, 2, 4, and 8;
10 - factors are 1, 2, 5, and 10;
12 - factors are 1, 2, 3, 4, 6, and 12 and so on.
thomas_dad
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發表於 12-3-5 17:08
