Required Mathematical Intelligence

Chapter 13
Once upon a time there was a farmer who raised many cattle in his life.Before death, leave a will: half of the total number of cows plus half head will be given to the son, half of the remaining cattle plus half head will be given to the wife, the remaining half plus half head will be given to the daughter, and the remaining half plus half head will be slaughtered and rewarded folks.After the farmers died, they happened to have nothing left after they were divided according to their wills.How many cows did they share?

[Answer: It is best to use the reverse method to solve this kind of questions.Because there was not a single cow left, it must have been killed.According to the requirements of the will, the daughter can only be divided into 2 heads, and only one head can be left.According to the same analysis, the results can be obtained: 8 heads for sons, 4 heads for wives, and 2 heads for daughters. ]
(End of this chapter)