{
  "title": "Subtraction - Using Number Line",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "On a number line, start at 9 and move back 2 steps. Where do you land?",
      "options": {
        "A": "7",
        "B": "8",
        "C": "6",
        "D": "5"
      },
      "correct_answer": "A"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "Start at 8 and jump back 3 steps. What number do you reach?",
      "options": {
        "A": "4",
        "B": "6",
        "C": "5",
        "D": "7"
      },
      "correct_answer": "C"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "Start at 10 and move back 1 step. Where do you land?",
      "options": {
        "A": "8",
        "B": "9",
        "C": "7",
        "D": "10"
      },
      "correct_answer": "B"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "Start at 7 and move 4 steps back. Which number do you reach?",
      "options": {
        "A": "5",
        "B": "4",
        "C": "3",
        "D": "2"
      },
      "correct_answer": "C"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "On the number line, 12 − 2 means moving back 2 steps from 12. What is the answer?",
      "options": {
        "A": "9",
        "B": "11",
        "C": "10",
        "D": "8"
      },
      "correct_answer": "C"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "Start at 14 and go back 5 steps. Where will you stop?",
      "options": {
        "A": "9",
        "B": "10",
        "C": "8",
        "D": "11"
      },
      "correct_answer": "A"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "Start at 6 and jump back 2 steps. What number do you get?",
      "options": {
        "A": "4",
        "B": "3",
        "C": "5",
        "D": "2"
      },
      "correct_answer": "A"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "Start at 11 and move back 3 steps. Where do you land?",
      "options": {
        "A": "8",
        "B": "9",
        "C": "7",
        "D": "6"
      },
      "correct_answer": "A"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Start at 15 and move back 4 steps. What is the result?",
      "options": {
        "A": "12",
        "B": "10",
        "C": "11",
        "D": "9"
      },
      "correct_answer": "C"
    },
    {
      "question_id": "10",
      "question": "Start at 13 and go back 6 steps. What number is reached?",
      "options": {
        "A": "9",
        "B": "8",
        "C": "7",
        "D": "6"
      },
      "correct_answer": "C",
      "id": 10,
      "difficulty": "easy"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "On a number line, move 2 steps back from 5. What is the number?",
      "options": {
        "A": "3",
        "B": "2",
        "C": "4",
        "D": "1"
      },
      "correct_answer": "A"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "Start at 16 and go back 3 steps. What do you get?",
      "options": {
        "A": "12",
        "B": "14",
        "C": "13",
        "D": "15"
      },
      "correct_answer": "C"
    },
    {
      "question_id": "13",
      "question": "Start at 9 and move back 5 steps. What number appears?",
      "options": {
        "A": "5",
        "B": "3",
        "C": "4",
        "D": "2"
      },
      "correct_answer": "C",
      "id": 13,
      "difficulty": "easy"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Start at 18 and go back 7 steps. What is the answer?",
      "options": {
        "A": "10",
        "B": "12",
        "C": "11",
        "D": "9"
      },
      "correct_answer": "C"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "Start at 7 and move back 1 step. What number?",
      "options": {
        "A": "7",
        "B": "6",
        "C": "5",
        "D": "4"
      },
      "correct_answer": "B"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "Start at 12 and move 4 steps back. What is the answer?",
      "options": {
        "A": "9",
        "B": "10",
        "C": "8",
        "D": "7"
      },
      "correct_answer": "C"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "Start at 17 and move back 5 steps. Where do you reach?",
      "options": {
        "A": "10",
        "B": "12",
        "C": "13",
        "D": "11"
      },
      "correct_answer": "B"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Start at 19 and jump back 8 steps. What number is reached?",
      "options": {
        "A": "11",
        "B": "12",
        "C": "10",
        "D": "9"
      },
      "correct_answer": "A"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "Start at 8 and go back 4 steps. What number do you reach?",
      "options": {
        "A": "3",
        "B": "5",
        "C": "4",
        "D": "6"
      },
      "correct_answer": "C"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "Start at 10 and move back 5 steps. What is the answer?",
      "options": {
        "A": "4",
        "B": "6",
        "C": "5",
        "D": "3"
      },
      "correct_answer": "C"
    },
    {
      "id": 21,
      "difficulty": "medium",
      "question": "Start at 15 and move back 6 steps. Where do you land?",
      "options": {
        "A": "11",
        "B": "9",
        "C": "10",
        "D": "8"
      },
      "correct_answer": "B"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "Start at 14 and go back 5 steps. What number is reached?",
      "options": {
        "A": "8",
        "B": "9",
        "C": "7",
        "D": "6"
      },
      "correct_answer": "B"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "Start at 13 and move back 6 steps. What is the answer?",
      "options": {
        "A": "6",
        "B": "7",
        "C": "8",
        "D": "5"
      },
      "correct_answer": "B"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Start at 12 and move 5 steps back. What number do you reach?",
      "options": {
        "A": "8",
        "B": "7",
        "C": "6",
        "D": "9"
      },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Start at 17 and jump back 8 steps. What number is reached?",
      "options": {
        "A": "9",
        "B": "8",
        "C": "10",
        "D": "7"
      },
      "correct_answer": "A"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "Start at 16 and move back 7 steps. What is the result?",
      "options": {
        "A": "8",
        "B": "10",
        "C": "9",
        "D": "7"
      },
      "correct_answer": "C"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "Start at 19 and move back 9 steps. Where do you land?",
      "options": {
        "A": "10",
        "B": "11",
        "C": "9",
        "D": "8"
      },
      "correct_answer": "A"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Start at 18 and jump back 7 steps. What number do you get?",
      "options": {
        "A": "10",
        "B": "11",
        "C": "12",
        "D": "9"
      },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "Start at 11 and move back 4 steps. What number do you get?",
      "options": {
        "A": "6",
        "B": "7",
        "C": "8",
        "D": "5"
      },
      "correct_answer": "B"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "Start at 15 and go back 7 steps. What number do you reach?",
      "options": {
        "A": "8",
        "B": "7",
        "C": "9",
        "D": "6"
      },
      "correct_answer": "A"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "Start at 14 and move 6 steps back. What is the number?",
      "options": {
        "A": "8",
        "B": "7",
        "C": "9",
        "D": "6"
      },
      "correct_answer": "A"
    },
    {
      "question_id": "32",
      "question": "Start at 17 and move back 6 steps. Where do you land?",
      "options": {
        "A": "10",
        "B": "11",
        "C": "12",
        "D": "9"
      },
      "correct_answer": "B",
      "id": 32,
      "difficulty": "medium"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "Start at 13 and move 7 steps back. What do you reach?",
      "options": {
        "A": "8",
        "B": "7",
        "C": "6",
        "D": "5"
      },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "Start at 12 and move back 8 steps. What is the result?",
      "options": {
        "A": "6",
        "B": "4",
        "C": "5",
        "D": "3"
      },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "Start at 19 and go back 6 steps. Where do you stop?",
      "options": {
        "A": "13",
        "B": "11",
        "C": "12",
        "D": "10"
      },
      "correct_answer": "A"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "Start at 18 and move back 5 steps. What number appears?",
      "options": {
        "A": "13",
        "B": "14",
        "C": "12",
        "D": "15"
      },
      "correct_answer": "A"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "Start at 16 and move back 8 steps. Where do you land?",
      "options": {
        "A": "9",
        "B": "8",
        "C": "7",
        "D": "6"
      },
      "correct_answer": "B"
    },
    {
      "question_id": "38",
      "question": "Start at 15 and move 6 steps back. What is the answer?",
      "options": {
        "A": "9",
        "B": "8",
        "C": "7",
        "D": "6"
      },
      "correct_answer": "A",
      "id": 38,
      "difficulty": "medium"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Start at 17 and go back 9 steps. What number do you reach?",
      "options": {
        "A": "9",
        "B": "7",
        "C": "8",
        "D": "6"
      },
      "correct_answer": "C"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "Start at 14 and move back 8 steps. What is the final number?",
      "options": {
        "A": "7",
        "B": "6",
        "C": "5",
        "D": "4"
      },
      "correct_answer": "B"
    },
    {
      "id": 41,
      "difficulty": "hard",
      "question": "Start at 19 and move back 8 steps. Where do you land?",
      "options": {
        "A": "11",
        "B": "12",
        "C": "10",
        "D": "9"
      },
      "correct_answer": "A"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "Start at 18 and move back 9 steps. What is the answer?",
      "options": {
        "A": "10",
        "B": "9",
        "C": "11",
        "D": "8"
      },
      "correct_answer": "B"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Start at 17 and jump back 7 steps. What number appears?",
      "options": {
        "A": "10",
        "B": "9",
        "C": "8",
        "D": "11"
      },
      "correct_answer": "A"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "Start at 16 and go back 9 steps. Where do you stop?",
      "options": {
        "A": "7",
        "B": "8",
        "C": "9",
        "D": "6"
      },
      "correct_answer": "A"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Start at 15 and move back 8 steps. What number do you reach?",
      "options": {
        "A": "7",
        "B": "6",
        "C": "8",
        "D": "9"
      },
      "correct_answer": "A"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "Start at 14 and jump back 9 steps. Where do you land?",
      "options": {
        "A": "5",
        "B": "6",
        "C": "4",
        "D": "7"
      },
      "correct_answer": "A"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "Start at 13 and move back 7 steps. What is the result?",
      "options": {
        "A": "6",
        "B": "5",
        "C": "4",
        "D": "7"
      },
      "correct_answer": "A"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "Start at 19 and move back 10 steps. Which number appears?",
      "options": {
        "A": "9",
        "B": "10",
        "C": "8",
        "D": "11"
      },
      "correct_answer": "A"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "Start at 18 and go back 8 steps. Where do you land?",
      "options": {
        "A": "10",
        "B": "12",
        "C": "9",
        "D": "11"
      },
      "correct_answer": "A"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "Start at 17 and move back 6 steps. What number is reached?",
      "options": {
        "A": "11",
        "B": "10",
        "C": "9",
        "D": "12"
      },
      "correct_answer": "A"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "Start at 16 and move back 8 steps. Which number appears?",
      "options": {
        "A": "8",
        "B": "9",
        "C": "7",
        "D": "10"
      },
      "correct_answer": "A"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "Start at 15 and jump back 9 steps. What do you get?",
      "options": {
        "A": "6",
        "B": "7",
        "C": "8",
        "D": "5"
      },
      "correct_answer": "A"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "Start at 14 and move back 8 steps. What number appears?",
      "options": {
        "A": "6",
        "B": "5",
        "C": "7",
        "D": "4"
      },
      "correct_answer": "A"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "Start at 13 and go back 9 steps. What is the result?",
      "options": {
        "A": "4",
        "B": "5",
        "C": "3",
        "D": "2"
      },
      "correct_answer": "A"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "Start at 12 and move back 7 steps. What number?",
      "options": {
        "A": "5",
        "B": "4",
        "C": "3",
        "D": "6"
      },
      "correct_answer": "A"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "Start at 11 and move back 6 steps. What is the answer?",
      "options": {
        "A": "5",
        "B": "4",
        "C": "6",
        "D": "3"
      },
      "correct_answer": "A"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "Start at 10 and go back 7 steps. Where do you land?",
      "options": {
        "A": "3",
        "B": "4",
        "C": "2",
        "D": "5"
      },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "Start at 12 and move back 9 steps. What number appears?",
      "options": {
        "A": "3",
        "B": "4",
        "C": "5",
        "D": "2"
      },
      "correct_answer": "A"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "Start at 18 and move back 7 steps. What number do you reach?",
      "options": {
        "A": "11",
        "B": "10",
        "C": "12",
        "D": "9"
      },
      "correct_answer": "A"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "Start at 17 and jump back 8 steps. What is the answer?",
      "options": {
        "A": "9",
        "B": "10",
        "C": "8",
        "D": "11"
      },
      "correct_answer": "A"
    }
  ]
}