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 point values of the removed beads is 147,000, how many red beads were removed? (A) 5 (B) 4 (C) 3 (D) 2 (E) 0作者: reaming 时间: 2010-3-1 13:59
此题答案是什么呢作者: yichaoe 时间: 2010-3-1 21:15
147000=2*2*3*5*5*7*7
红珠对应7点
上面的分解因式包含两个7
所以答案是红珠2颗 选D 请牛人确认
作者: xiaoxiangxixi 时间: 2010-3-2 06:55
明白了，多谢！其实回头想想蛮简单的，丢脸！
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