Question

求助一道PS题目

In a certain game, a large container is filled with red , yellow, green and blue beads worth, respectively, 7,5,3 and 2 points each. A number of beads are then removed from the container . If the product of the points values of the removed beads is 147,000, how many red beads were removed? A 5B 4C 3D 2E 0有解释，但是太快了看不懂能不能拆解一下啊，谢谢。还有，product一般在题目里是两种意思吗？ 乘积和因子？ 是吗

Answer 1

容器里装着红，黄，绿，蓝色珠子，分别对应7，5，3，2分。从容器中移除珠子得到的分数是147000，求移走的红色珠子的次数。做法： 147000=7^a×5^b×3^c×2^d。求a。 其实就是把147000分解成很多因子，看看跟7的关系，用147000除7看能除多少次，很显然是2次。product 只是乘积 查看原帖>>

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