“150盏亮着的电灯,各有一个拉线开关控制,顺序编号为1,2,3,4,…,150。将编号为3的倍数的灯的拉线各拉一下,再将编号为5的倍数的拉线各拉一下,拉完后亮着的灯数为几盏?”一道数学题,自己的答案跟书本给出的标准答案不一样怎么办?大部分学生选择改正,而成都高新区西芯小学一名9岁男孩罗弋却通过联系生活实际,算出答案“90”推翻了所谓的正确答案“80”。而在求证的过程中,家长发现这道题不仅考倒了 “150 light lights, each with a pull switch control, the order number is 1, 2, 3, 4, ..., 150. The number of 3 times the number of lamps pull each pull a little, then the number 5 The number of pull the cable pull a bit, pull the light after the number of lights for a few? ”A math problem, his answer is not the same as the standard answer given by the book? Most students choose to correct, and Chengdu high-tech District West core primary school, a 9-year-old boy Luo Yi but by contact with the actual life, calculate the answer “90 ” overthrow the so-called correct answer “80 ”. In the process of verification, parents found that the problem not only test it