AMC8真题打卡【Day2】

2023年AMC8竞赛

第一题解析：D(18)

第二题解析：E

2023年AMC8第一题

考点：应用题

Wind chill is a measure of how cold people feel when exposed to wind outside. A good estimate for wind chill can be found using this calculation:(wind chill) = (air temperature)-0.7 x (wind speed), where temperature is measured in degrees Fahrenheit (F) and wind speed is measured in miles per hour (mph). Suppose the air temperature is 36°F and the wind speed is 18 mph. Which of the following is closest to the approximate wind chill?

风寒指数是指人们暴露在室外风中所感受到的寒冷程度。使用以下计算方法可以很好地估计风寒指数:(风寒)=(气温)-0.7 x(风速)，温度以华氏度(°F)为单位，风速以英里每小时(mph)为单位。假设气温是36°F,风速是18英里每小时，下面哪个选项最接近风寒指数?

(A)18(B)23(C)28(D)32 (E)35

2023年AMC8第四题

考点：找规律

The numbers from 1 to 49 are arranged in a spiral pattern on a square grid, beginning at the center. The first few numbers have been entered into the grid below. Consider the four numbers that will appear in the shaded squares, on the same diagonal as the number 7. How many of these four numbers are prime?

将数字1到49以螺旋状排列在下图的方形网格上。从中心开始，前几个数字已经填入到了下面的网格中。请问与7在同一条对角线上的这四个阴影方格中的数有几个是质数?

同学可以自己尝试完成这两道题目，我们也会推送解析。

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