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?

風寒指數是指人們暴露在室外風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寒指數:(風寒)=(氣溫)-0.7 x(風速)，溫度以華氏度(°F)為單位，風速以英里每小時(mph)為單位。假設氣溫是36°F,風速是18英里每小時，下面哪個選項最接近風寒指數?

(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?

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

同學可以自己嘗試完成這兩道題目，我們也會推送解析。

犀牛教育AMC8課程輔導

犀牛教育具有豐富的國際競賽深度教學經驗，針對計劃備考2025AMC8數學競賽的學生開設Pre-AMC8和AMC8兩大系列課程，專業(yè)的競賽老師針對不同基礎的學生進行有針對性的輔導規(guī)劃，為學生搭建完整的AMC8數學競賽知識體系架構，做好備考準備，為后續(xù)學習打牢堅實基礎。【根據學前測結果推薦班型】

AMC8課程私信客服