2. 外语
  3. If p and n are prime numbers, p-n=4, and 1.5＜p/n＜2, what is the value of p?________.

If p and n are prime numbers, p-n=4, and 1.5＜p/n＜2, what is the value of p?________.

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问题 If p and n are prime numbers, p-n=4, and 1.5＜p/n＜2, what is the value of p?________.
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答案11
解析 根据题目p、n是质数，p-n=4，1.5＜p/n＜2，得出4＜n＜8。质数n的可能取值为5、7，p的值可能为9、11。P是质数，所以n=7，P=11。故答案为11。
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