Topic

质数与合数

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Quizzes in 质数与合数

Arithmetic & Number System Mathematics

从下列数中选出所有质数：15、17、21、23。

15
17
21
23

Correct answer(s):

17
23

Arithmetic & Number System Mathematics

下列哪个数是质数

51
57
59
63

Correct answer(s):

59