11th OG 234题

uspresident

234. In a certain game, a large container is filled with red, yellow, green, and bule 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 point values of the removed beads id 147,000, how many red beads were removed?

5  4   3  2  0

Key is 2.

完全做不出来，题也看不懂。好像讲的是在那个容器里有4种颜色的珠子，每种代表不同的值7，5，3，2。要一共移出值的合为147，000的珠子，会移出多少红色的珠子？请教各位应该怎么解？

meimei5656

147000=7^2*3*2^3*5^3

so there are 2 beads with 7 points

uspresident

我实在太菜了，请问楼上的^代表什么意思，如果*代表乘的话？

7^2*3*2^3*5^3的意义是什么呀？

trifling

^代表乘方，或次方7^2表示7的二次方，5^3代表5的3次方