mr and mrs tan attended a party at which there were three other couples .various handshakes took place.
1)no one shook hands with his/her spouse
2)no one shook hands with the same person more than once
3)no one shook with his /her own hands
after all the handshakings,mr tan ask each person including his wife,how many hands he or she had shaken.
to his surprise,each gave a different answers.

how many hands did mrs tan shake?



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