Bài 1: Tìm tập hợp các số tự nhiên n vừa chia hết cho 3, vừa chia hết cho 5 và 98< n <122 Bài 2: Tìm tập hợp các số tự nhiên n chia hết cho 3 nhưng ko chia hết cho 9 và 100< n ≤118 Bài 3: Trong các số sau, số nào là số nguyên tố, số nào là hợp số: 3; 11; 172; 58; 128; 51; 93 GIÚP EM TIẾP VỚI Ạ, em sẽ gửi anh chị 5* và 💯

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