6S1_Test2

Tập hợp các số tự nhiên có 2 chữ số nhỏ hơn 20 là

• 5, 6, 7, 8, 9
• 20, 21, 22, 23, 24
• [10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
• 30, 31, 32, 33, 34

• {13, 14, 15, 16, 17, 18, 19}
• {13, 14, 15, 16}
• {20, 21, 22}
• {10, 11, 12}

• {19, 20, 21, 22, 23}
• {21, 22, 23, 24, 25}
• {21, 22, 23, 24, 25, 26}
• {20, 21, 22, 23, 24}

• {15, 16, 17, 18, 19}

• {10, 11, 12}

• {14, 15, 16, 17}

• {20, 21, 22}

• {6, 7, 8, 9}

• {5, 6, 7, 8}

• {1, 2, 3, 4}

• {10, 11, 12}

• {5, 6, 7, 8}

• {7, 8, 9, 10}

• {8, 9, 10, 11, 12, 13, 14}

• {15, 16, 17}

• {0, 1, 2, 3, 4}

• {1, 2, 3, 4, 5}

• {5, 6, 7}

• {0, 1, 2}

• {19, 20, 21, 22, 23}
• {20, 21, 22, 23, 24, 25}
• {20, 21, 22, 23, 24, 26}
• {21, 22, 23, 24, 25, 26}

• {75, 76, 77, 78}
• {81, 82, 83}
• {76, 77, 78, 79, 80, 81, 82}
• {77, 78, 79, 80, 81}

• {10, 11, 12, 13, 14}

• {9, 10, 11, 12}

• {10, 11, 12, 13, 14, 15}

• {15, 16, 17}