Cha`o ca'c ba'c quan ta^m to+'i mu.c Gia?i tri' Toa'n ho.c
Do Ngoc Minh gave a nice answer to the Politican Puzzle. Here is
another puzzle which is simple but not very easy.
The twin brothers
There are twin brothers one of the two is named An. One lies and one tells
the truth. How can you discover which brother is An by asking them ONE
THREE-WORD QUESTION ?
Cheers
Thang