Question 1
Rahul says: 'I came first'
Sunil says: 'Rahul did not come first'
Kiran says: 'I came second'
Priya says: 'Kiran is lying'
Exactly two contestants tell the truth. Who came first?
Let's solve by cases:
Case 1: Rahul came first.
Then statement 1 is true, statement 2 is false.
If statement 2 is false, then Sunil is liar.
Statement 3: Kiran says 'I came second' - unknown.
Statement 4: Priya says 'Kiran is lying'.
This leads to multiple possibilities.
Case 2: Sunil came first.
Then statement 1 is false → Rahul is liar.
Statement 2 is true → Sunil is truth-teller.
If Kiran came second, statement 3 is true → Kiran is truth-teller.
Then statement 4 says 'Kiran is lying' - false → Priya is liar.
This gives 2 truth-tellers (Sunil, Kiran) and 2 liars, consistent.
Therefore, the only consistent assignment is Sunil came first.
Case 1: Rahul came first.
Then statement 1 is true, statement 2 is false.
If statement 2 is false, then Sunil is liar.
Statement 3: Kiran says 'I came second' - unknown.
Statement 4: Priya says 'Kiran is lying'.
This leads to multiple possibilities.
Case 2: Sunil came first.
Then statement 1 is false → Rahul is liar.
Statement 2 is true → Sunil is truth-teller.
If Kiran came second, statement 3 is true → Kiran is truth-teller.
Then statement 4 says 'Kiran is lying' - false → Priya is liar.
This gives 2 truth-tellers (Sunil, Kiran) and 2 liars, consistent.
Therefore, the only consistent assignment is Sunil came first.