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Solve this puzzle without algebra: For a group of 12 people, 6 dishes of rice, 4 dishes of broth, and 3 dishes of meat is needed, which gi...
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Based on research on the Internet, we can assume the height of the bike is around 140 cm. I use the height of the letter "U" as...
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Here is my thinking process: For the 1st weigh, it can only represent 1 weight. For the 2nd weigh, it can represent 2* 1 +1 = 3 different ...
Brief but good!
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