注目の話題: 誰からも愛されない; 初対面の人と仲良くなれません。; おばさんイジリされる職場

Science,English,and math 4th

No.378　21/04/21 20:04
燻し銀三 ( 60代 ♂ IJ7P0b ) あ+あ-

【Do you know a almighty pair of scales?】

《Look for a fake coin!》

...it means that if the number of coins is a multiple of 3, we can point out the fake coin as long as we can use the pair of scales n times.

Except for the examples which were shown until now, the author recommended we try to count various number of coins, and think of the way of finding the fake coin. He said it will be a good exercise for the brain.

《A question in which a sense of mathematic is necessary for us》

The author said there is one more question and he said he wanted us to think it over. It’s in relation to the...

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