逆向速算 脑力世界杯
逆向速算来源于著名的“24点智力游戏”，通过把系统出示的1～13中的4个数据用加、减、乘、除和括号连接成算式，使其计算结果等于24，综合训练大脑的注意力、发散思维、逆向思维、想象力和记忆力。
24-point originates from the famous "24-point game". By adding, subtracting, multiplying, dividing and bracketing four data from 1-13 produced by the system into an arithmetic formula, the result is equal to 24. It integrates training of the brain's attention, divergent thinking, reverse thinking, imagination and memory.
1.选手在“脑力中国”（也称“国际脑力运动”）线上平台报名参加脑力世界杯并选中本项比赛。
Athlete register Intellectual World Cup on the "International Intellectual Sports" online platform and select this discipline.
2.点击进入本项目比赛倒计时页面，倒计时归零后立即开始比赛。
Clicked into the countdown page, and the competition began immediately after the countdown returned to zero.
3.比赛分三轮进行。系统逐一出题，每题给出1～13之中的4个数据，选手使用加、减、乘、除运算符号和括号把它们连成一个算式，使其运算结果等于24。每轮比赛10分钟，不限题目数量，不答而直接点击“下一题”则减少剩余答题时间2秒，连续作答“本题无解”不可超过5次，否则系统将强制提交本轮成绩，答对题数越多分数越高。
The game is carried out in three rounds.The system comes out one by one. Each question is given 4 digit from 1to13. Athlete use add, subtract, multiply, divide and brackets to connect them into one formula equal to 24. Each round is 10 minutes, the quantity of questions is no-limit, the remaining time is reduced by 2 seconds for not answer directly click "next question",continuous answer "unsolvable" can not be more than 5 times, otherwise the system will be mandatory to submit the results of this round, more answer questions wins.
4.待所有选手答题结束后，系统自动统计并公布本项目所有选手和战队的成绩。
After the end of this discipline, the system automatically calculates and releases the result.
1.答对1题得9分。
9 points for each right answer.
2.总分高者胜，总分相同则正确率高者胜。
A high score wins, if the score is the same, high correct rate wins.
1.选手得分=正确答题数×9。
The score is quantity of right answer multiplied by 9.
2.取最高分轮次的成绩参与排名。
The highest round score is the final score.