AMC 8 1997 Problem 25

AMC8 1997 年第 25

余数与同余★★★★
All of the even numbers from 2 to 98 inclusive, excluding those ending in 0, are multiplied together. What is the rightmost digit (the units digit) of the product?
将 2 到 98(含)之间所有不以 0 结尾的偶数相乘。乘积的最右边数字(个位数字)是多少?
  1. A.0
  2. B.2
  3. C.4
  4. D.6
  5. E.8

正确答案 · Correct Answer

D

解析 · Solution

解析整理中

继续练习

真题版权归属 MAA(AMC)。本站仅供学习用途。版权方如有异议,请联系本站予以下架。

Problems © MAA (AMC). This site is for study purposes only. Rightsholders may contact us for removal.