Question 1
Rohan says: 'Ravi has the gold coin'
Ravi says: 'I do not have the gold coin'
Pooja says: 'Rohan is lying'
Can all these statements be true simultaneously?
Let's test if all statements can be true:
Assumption 1: If Rohan tells truth, then Ravi has gold coin.
But Ravi claims not to have it - contradiction if Ravi tells truth.
If Ravi lies, then Ravi DOES have the item - consistent with Rohan.
Then Pooja says Rohan lies - but we assumed Rohan tells truth - contradiction!
Assumption 2: If Rohan lies, then Ravi does NOT have gold coin.
Ravi says the same thing - consistent if Ravi tells truth.
Pooja says Rohan lies - consistent if Pooja tells truth.
Therefore, all statements CAN be consistent when Rohan lies, Ravi and Pooja tell truth.
Thus, the statements are consistent.
Assumption 1: If Rohan tells truth, then Ravi has gold coin.
But Ravi claims not to have it - contradiction if Ravi tells truth.
If Ravi lies, then Ravi DOES have the item - consistent with Rohan.
Then Pooja says Rohan lies - but we assumed Rohan tells truth - contradiction!
Assumption 2: If Rohan lies, then Ravi does NOT have gold coin.
Ravi says the same thing - consistent if Ravi tells truth.
Pooja says Rohan lies - consistent if Pooja tells truth.
Therefore, all statements CAN be consistent when Rohan lies, Ravi and Pooja tell truth.
Thus, the statements are consistent.