Câu hỏi:
There is a man who can make a cigarette out of 4 cigarette butts. After he makes them, he smokes them. Today, he found 16 butts. How many cigarettes can he make?
Đáp án:
5. Remember how I said he liked to smoke them? When he smoked the 4 cigarettes, they turned into butts, and he made another cigarette.
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