AMC 8 2001 Problem 4
AMC8 2001 年第 4 题
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The digits 1, 2, 3, 4 and 9 are each used once to form the smallest possible even five-digit number. The digit in the tens place is
数字 1，2，3，4 和 9 每个使用一次，形成最小的五位偶数。则这个数的十位数字是？ Problem 5 On a dark and stormy night Snoopy suddenly saw a flash of lightning. Ten seconds later he heard the sound of thunder. The speed of sound is feet per second and one mile is feet. Estimated, to the nearest half-mile, how far Snoopy was from the flash of lightning? 在一个漆黑的暴风雨之夜，Snoopy 突然看到一道闪电。十秒钟后，他听到了雷声。音速是 1088 英尺每秒（一英里等于 5280 英尺）。请估算 Snoopy 离闪电有多少英里（结果精确到 0.5 英里）？
- A.1
- B.2
- C.3
- D.4
- E.9
正确答案 · Correct Answer
E
解析 · Solution
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