Question 10
Tí’s four friends Sửu, Dần, Mão and Thìn hold a running race. Afterwards Sửu says, “Mão finished first.” Dần says, “Unfortunately, I did not finish first.” Mão says, “Dần won.” Thìn says, “I did not win.” Tí knows exactly one statement is false and the other three are true. Who won? Explain your reasoning.
