AMC 8 2006 Problem 25
AMC8 2006 年第 25 题
奇偶性★★★★☆
Barry wrote 6 different numbers, one on each side of 3 cards, and laid the cards on a table, as shown. The sums of the two numbers on each of the three cards are equal. The three numbers on the hidden sides are prime numbers. What is the average of the hidden prime numbers?
在 3 张牌的两面各写了一个数，共写了 6 个不同的数字，然后把牌放在桌子上，如图所示。每张卡片上的两个数字之和都相等。没有翻开的三个面上的数字都是质数。则这 3 个没翻开的面上的质数的平均值是多少？
- A.13
- B.14
- C.15
- D.16
- E.17
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
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