AMC8真題打卡【Day2】

2023年AMC8競賽

第一題解析：D(18)

第二題解析：E

2023年AMC8第一題

考點：應(yīng)用題

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?

風(fēng)寒指數(shù)是指人們暴露在室外風(fēng)中所感受到的寒冷程度。使用以下計算方法可以很好地估計風(fēng)寒指數(shù):(風(fēng)寒)=(氣溫)-0.7 x(風(fēng)速)，溫度以華氏度(°F)為單位，風(fēng)速以英里每小時(mph)為單位。假設(shè)氣溫是36°F,風(fēng)速是18英里每小時，下面哪個選項最接近風(fēng)寒指數(shù)?

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

2023年AMC8第四題

考點：找規(guī)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?

將數(shù)字1到49以螺旋狀排列在下圖的方形網(wǎng)格上。從中心開始，前幾個數(shù)字已經(jīng)填入到了下面的網(wǎng)格中。請問與7在同一條對角線上的這四個陰影方格中的數(shù)有幾個是質(zhì)數(shù)?

同學(xué)可以自己嘗試完成這兩道題目，我們也會推送解析。

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