1, you have made some people for seven days, you have to use a gold bar as a remuneration. This gold bars are divided into seven. You must give them a piece after you have a daily life. If you can only cut this gold bars twice, how do you give these workers?
2, suppose you have 8 balls, one of which is slightly slightly, but the only way to find out this ball is to put two balls on the balance. How many times can you find this more heavy ball?
Please leave your own method later,
I will come back in time.
I will also post my answer for a while.
Annimate answer, from
Key
: 1. Is it not enough to divide this gold bars into 1/7, 2/7, 4/7! (Don't forget, it is also a currency, it can be circulated, it can be exchanged! Haha) 2. It can be called a special ball twice with three-way: 8 balls into three groups - 3; 3 2, the first county said two 3 to find a special ball in that group, the second time I don't have to say it (divided into two cases)!
