Mathematics
Junior High

この問題の解き方を教えてください。二枚目が解説です。答えは36個です

⑳) のを自然数とすると, 最大公約数が12だか ら, 7三122, 48ニ12X4 。 7と48 の最小公倍数が144 だから, 12xX4三144 3

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