- 26 Tháng mười hai 2018
- 50
- 30
- 11
- 18
- Quảng Ninh
- THCS Trần Quốc Toản


Dịch hộ mình đoạn văn này với. Google dịch nhà mình bị lỗi.
A magic trick
A teacher is showing a magic trick to his students. He places 12 coins on a table, 5 of which are heads up and 7 are tails up. He then placs a blindfold over his eyes and shuffles the coins, keeping the faces up. Next, he serapates the coins into two piles of 5 and 7 respectively. He flips over all the coins in the small pile. Both piles have the same number of heads up!