Question

Rome has 3 daughters. The youngest one always tells lies, the oldest one always tells truth and the middle one tells either true or false.
One day a rich person came and asked Rome that he wants to marry one of his daughters.
Naturally he wants the oldest or the youngest so that he always knows the truth or false.
Rome agreed but said he have to ask one yes or no question to any of the three daughters (any one) by which he can understand who is youngest or who is the oldest daughter.
Three daughters looks alike.
What is that one yes or no question by which he can understand who is youngest or who is oldest daughter so that he can marry either the oldest or the youngest daughter?

Answer 1

This is so interesting...
Is she older than her?" (He would ask one of the daughters if one of the other daughters is older than the last daughter). He always should pick the younger daughter based on what he knows. If he asks the older daughter and she says yes, then the youngest daughter will be known. If he asks the older daughter and she says no, then the youngest daughter is the other one. If he asks the youngest daughter and she says yes, she is lying and he will still pick the oldest. If he asks the youngest and she says no, he will just pick the other like in the first case. If he asks the middle daughter it doesn't matter because both will be acceptable choices.