Wrong Address By Liar
Mr. House would like to visit his old friend Mr. Street, who is living
in the main street of a small village. The main street has 50 houses
divided into two blocks and numbered from 1 to 20 and 21 to 50. Since
Mr. House has forgotten the number, he asks it from a passer-by, who
replies "Just try to guess it." Mr. House likes playing games and asks
three questions:
1. In which block is it?
1. In which block is it?
2. Is the number even?
3. Is it a square?
After Mr. House has received the answers, he says: "I'm still doubting, but if you'll tell me whether the digit 4 is in the number, I will know the answer!". Then Mr. House runs to the building in which he thinks his friend is living. He rings, a man opens the door and it turns out that he's wrong. The man starts laughing and tells Mr. House: "Your advisor is the biggest liar of the whole village. He never speaks the truth!". Mr. House thinks for a moment and says "Thanks, now I know the real address of Mr. Street".
