Câu hỏi:
Which of the following statements are true, and which are false? 1. Only one of the statements is false 2. Exactly two of the statements are false. 3. Only three of the statements are false. 4. Exactly four of the statements are false. 5. All five of these statements are false.
Đáp án:
The only true statement can be #4. The others are false. #5 can't be true, because it says all the statements are false.
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