2009-08-16から1日間の記事一覧
英語の練習とはあまり関係がありませんが、たまには気分転換のパズルをしてみませんか?Mr. Smith has two children aged 7 and 5. One day, he was walking down the street with his boy. What is the probability of the other child being a boy? スミス…
英語の練習とはあまり関係がありませんが、たまには気分転換のパズルをしてみませんか?Mr. Smith has two children aged 7 and 5. One day, he was walking down the street with his boy. What is the probability of the other child being a boy? スミス…