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