{
  "title": "Use of Bar Graphs (Data Handling) - Grade 7 ICSE",
  "total_questions": 60,
  "questions": [
    {
      "id": 1,
      "difficulty": "easy",
      "question": "In a bar graph, what does the height of a bar represent? 📊",
      "options": {
        "A": "Color",
        "B": "Value/Frequency",
        "C": "Width",
        "D": "Title"
      },
      "correct_answer": "B"
    },
    {
      "id": 2,
      "difficulty": "easy",
      "question": "Which axis is usually used for categories in a bar graph? 🚗",
      "options": {
        "A": "X-axis",
        "B": "Y-axis",
        "C": "Z-axis",
        "D": "Diagonal axis"
      },
      "correct_answer": "A"
    },
    {
      "id": 3,
      "difficulty": "easy",
      "question": "If a bar reaches 40 on the scale, what does it mean? ✏️",
      "options": {
        "A": "It is 40 cm tall",
        "B": "The value is 40",
        "C": "It has 40 colors",
        "D": "It is bar number 40"
      },
      "correct_answer": "B"
    },
    {
      "id": 4,
      "difficulty": "easy",
      "question": "What is the title of a bar graph used for? 🧵",
      "options": {
        "A": "Decoration",
        "B": "Tell what the graph is about",
        "C": "To fill space",
        "D": "To make it colorful"
      },
      "correct_answer": "B"
    },
    {
      "id": 5,
      "difficulty": "easy",
      "question": "In a bar graph showing favorite fruits, apples have a bar of height 25. What does 25 mean? 🍎",
      "options": {
        "A": "25 people like apples",
        "B": "Apples are 25 grams",
        "C": "There are 25 apples",
        "D": "The bar is 25 cm wide"
      },
      "correct_answer": "A"
    },
    {
      "id": 6,
      "difficulty": "easy",
      "question": "What do we call the horizontal line at the bottom of a bar graph? 🎈",
      "options": {
        "A": "Y-axis",
        "B": "X-axis",
        "C": "Title line",
        "D": "Zero line"
      },
      "correct_answer": "B"
    },
    {
      "id": 7,
      "difficulty": "easy",
      "question": "What do we call the vertical line on the left of a bar graph? 🦋",
      "options": {
        "A": "X-axis",
        "B": "Y-axis",
        "C": "Side line",
        "D": "Height line"
      },
      "correct_answer": "B"
    },
    {
      "id": 8,
      "difficulty": "easy",
      "question": "If the scale on Y-axis is 1 unit = 5 students, a bar of height 4 units means how many students? 👫",
      "options": { "A": "4", "B": "5", "C": "9", "D": "20" },
      "correct_answer": "D"
    },
    {
      "id": 9,
      "difficulty": "easy",
      "question": "Which type of data is best shown using a bar graph? 🎯",
      "options": {
        "A": "Comparing categories",
        "B": "Showing temperature change over time",
        "C": "Parts of a whole",
        "D": "Exact decimal numbers"
      },
      "correct_answer": "A"
    },
    {
      "id": 10,
      "difficulty": "easy",
      "question": "What should be written on the X-axis? 🐛",
      "options": {
        "A": "Numbers",
        "B": "Categories (like names)",
        "C": "Scale",
        "D": "Title of graph"
      },
      "correct_answer": "B"
    },
    {
      "id": 11,
      "difficulty": "easy",
      "question": "What should be written on the Y-axis? 🌼",
      "options": {
        "A": "Categories",
        "B": "Scale/Values",
        "C": "Graph title",
        "D": "Names of people"
      },
      "correct_answer": "B"
    },
    {
      "id": 12,
      "difficulty": "easy",
      "question": "If a bar graph shows marks of 4 students, how many bars will it have? 🏀",
      "options": { "A": "2", "B": "3", "C": "4", "D": "5" },
      "correct_answer": "C"
    },
    {
      "id": 13,
      "difficulty": "easy",
      "question": "A bar graph showing months on X-axis and rainfall on Y-axis is called what? ☔",
      "options": {
        "A": "Rainfall bar graph",
        "B": "Monthly bar graph",
        "C": "Category bar graph",
        "D": "Vertical bar graph"
      },
      "correct_answer": "A"
    },
    {
      "id": 14,
      "difficulty": "easy",
      "question": "Can bars in a bar graph touch each other? 🐌",
      "options": {
        "A": "Yes, always",
        "B": "No, never",
        "C": "Sometimes",
        "D": "Only on Sundays"
      },
      "correct_answer": "B"
    },
    {
      "id": 15,
      "difficulty": "easy",
      "question": "What is the space between bars called? 🍚",
      "options": { "A": "Gap", "B": "Margin", "C": "Space", "D": "Distance" },
      "correct_answer": "A"
    },
    {
      "id": 16,
      "difficulty": "easy",
      "question": "If scale is 1 unit = 10 books, a bar of 3 units means how many books? 📚",
      "options": { "A": "3", "B": "10", "C": "13", "D": "30" },
      "correct_answer": "D"
    },
    {
      "id": 17,
      "difficulty": "easy",
      "question": "What does a double bar graph show? 🍦",
      "options": {
        "A": "Two sets of data for comparison",
        "B": "Bars that are twice as thick",
        "C": "Graph with two titles",
        "D": "Bars in two colors"
      },
      "correct_answer": "A"
    },
    {
      "id": 18,
      "difficulty": "easy",
      "question": "Which part of the bar graph tells you what each bar represents? 🎁",
      "options": {
        "A": "Scale",
        "B": "Labels on X-axis",
        "C": "Y-axis numbers",
        "D": "The bars themselves"
      },
      "correct_answer": "B"
    },
    {
      "id": 19,
      "difficulty": "easy",
      "question": "If Y-axis scale is 0, 5, 10, 15,... what is the interval? 🌞",
      "options": { "A": "0", "B": "5", "C": "10", "D": "15" },
      "correct_answer": "B"
    },
    {
      "id": 20,
      "difficulty": "easy",
      "question": "What is the first step in reading a bar graph? 🎀",
      "options": {
        "A": "Count the bars",
        "B": "Read the title",
        "C": "Measure bar width",
        "D": "Check the colors"
      },
      "correct_answer": "B"
    },
    {
      "id": 21,
      "difficulty": "medium",
      "question": "In a bar graph, the bar for 'Science' is twice as tall as the bar for 'Math'. If Math has 30 students, how many for Science? 🧪",
      "options": { "A": "15", "B": "30", "C": "60", "D": "90" },
      "correct_answer": "C"
    },
    {
      "id": 22,
      "difficulty": "medium",
      "question": "A bar graph shows sales: Mon=40, Tue=60, Wed=50, Thu=80. Which day had highest sales? 🏪",
      "options": { "A": "Mon", "B": "Tue", "C": "Wed", "D": "Thu" },
      "correct_answer": "D"
    },
    {
      "id": 23,
      "difficulty": "medium",
      "question": "In a graph, scale is 1 cm = 20 people. A bar is 4.5 cm tall. How many people does it represent? 📏",
      "options": { "A": "80", "B": "85", "C": "90", "D": "95" },
      "correct_answer": "C"
    },
    {
      "id": 24,
      "difficulty": "medium",
      "question": "Find the difference: In a graph, Delhi's temp bar = 35 units, Mumbai's = 28 units. If 1 unit = 1°C, what's the difference? 🌡️",
      "options": { "A": "6°C", "B": "7°C", "C": "8°C", "D": "9°C" },
      "correct_answer": "B"
    },
    {
      "id": 25,
      "difficulty": "medium",
      "question": "Total students from graph: Class A=25, B=30, C=35, D=40. How many students total? 👨‍🎓",
      "options": { "A": "120", "B": "125", "C": "130", "D": "135" },
      "correct_answer": "C"
    },
    {
      "id": 26,
      "difficulty": "medium",
      "question": "If a bar reaches halfway between 20 and 40 on Y-axis, what is its value? 📐",
      "options": { "A": "20", "B": "30", "C": "40", "D": "60" },
      "correct_answer": "B"
    },
    {
      "id": 27,
      "difficulty": "medium",
      "question": "In a double bar graph, blue bars show boys, pink bars girls. If blue bar for Class 8 = 45, pink bar = 35, total students? 👦👧",
      "options": { "A": "70", "B": "75", "C": "80", "D": "85" },
      "correct_answer": "C"
    },
    {
      "id": 28,
      "difficulty": "medium",
      "question": "Monthly sales are: January = 60, February = 40, March = 55, April = 25. Which month had sales less than 50 but more than 30? 📅",
      "options": {
        "A": "January",
        "B": "February",
        "C": "March",
        "D": "April"
      },
      "correct_answer": "B"
    },
    {
      "id": 29,
      "difficulty": "medium",
      "question": "If the scale is 1 unit = 5 km, and a bar is 7 units tall, distance = ? 🗺️",
      "options": { "A": "12 km", "B": "30 km", "C": "35 km", "D": "40 km" },
      "correct_answer": "C"
    },
    {
      "id": 30,
      "difficulty": "medium",
      "question": "In a survey graph, 'Yes' bar = 120, 'No' bar = 80. How many people were surveyed? 📝",
      "options": { "A": "180", "B": "190", "C": "200", "D": "210" },
      "correct_answer": "C"
    },
    {
      "id": 31,
      "difficulty": "medium",
      "question": "If the interval on Y-axis is 10, what comes after 50? 🔢",
      "options": { "A": "51", "B": "55", "C": "60", "D": "100" },
      "correct_answer": "C"
    },
    {
      "id": 32,
      "difficulty": "medium",
      "question": "From graph: TV=4 hrs, Phone=6 hrs, Study=8 hrs, Play=2 hrs. Which activity is twice TV? 📱",
      "options": { "A": "Phone", "B": "Study", "C": "Play", "D": "None" },
      "correct_answer": "B"
    },
    {
      "id": 33,
      "difficulty": "medium",
      "question": "If a bar is at 25 on scale where each unit=4 items, how many items? 🛒",
      "options": { "A": "25", "B": "50", "C": "100", "D": "125" },
      "correct_answer": "C"
    },
    {
      "id": 34,
      "difficulty": "medium",
      "question": "In a class graph, height of bar for 'B' is 3.5 cm. If 1 cm = 10 marks, marks for B? 📈",
      "options": { "A": "30", "B": "35", "C": "40", "D": "45" },
      "correct_answer": "B"
    },
    {
      "id": 35,
      "difficulty": "medium",
      "question": "Total of 4 bars is 200. Three bars are 40, 60, 50. What is the fourth? ➕",
      "options": { "A": "40", "B": "50", "C": "60", "D": "70" },
      "correct_answer": "B"
    },
    {
      "id": 36,
      "difficulty": "medium",
      "question": "From graph, find the mode: Values: 15, 20, 15, 25, 20, 15 🎲",
      "options": { "A": "15", "B": "20", "C": "25", "D": "30" },
      "correct_answer": "A"
    },
    {
      "id": 37,
      "difficulty": "medium",
      "question": "If bar for 'Water' is 3 times bar for 'Juice', and Juice=15, Water=? 🥤",
      "options": { "A": "30", "B": "35", "C": "40", "D": "45" },
      "correct_answer": "D"
    },
    {
      "id": 38,
      "difficulty": "medium",
      "question": "In a graph with scale 2 cm = 100 people, a bar of 5 cm represents? 👥",
      "options": { "A": "200", "B": "250", "C": "300", "D": "350" },
      "correct_answer": "B"
    },
    {
      "id": 39,
      "difficulty": "medium",
      "question": "Which is NOT a part of a bar graph? ❌",
      "options": {
        "A": "Bars",
        "B": "Title",
        "C": "Pie slices",
        "D": "Axis labels"
      },
      "correct_answer": "C"
    },
    {
      "id": 40,
      "difficulty": "medium",
      "question": "If the difference between two bars is 15 units and scale is 1 unit=2 votes, vote difference? 🗳️",
      "options": { "A": "15", "B": "25", "C": "30", "D": "35" },
      "correct_answer": "C"
    },
    {
      "id": 41,
      "difficulty": "hard",
      "question": "In a double bar graph, 2010 bar=45, 2020 bar=60. What is the percentage increase? 📅",
      "options": { "A": "25%", "B": "30%", "C": "33.33%", "D": "40%" },
      "correct_answer": "C"
    },
    {
      "id": 42,
      "difficulty": "hard",
      "question": "From graph: A=20, B=30, C=40, D=50, E=60. What is the average? 📊",
      "options": { "A": "35", "B": "38", "C": "40", "D": "42" },
      "correct_answer": "C"
    },
    {
      "id": 43,
      "difficulty": "hard",
      "question": "Total budget=₹5000. Bar heights: Food=40%, Rent=30%, Others=30%. How much for Food? 💰",
      "options": { "A": "₹1500", "B": "₹2000", "C": "₹2500", "D": "₹3000" },
      "correct_answer": "B"
    },
    {
      "id": 44,
      "difficulty": "hard",
      "question": "In a graph, if bar for P is 25% taller than bar for Q, and Q=80, find P. 📏",
      "options": { "A": "90", "B": "100", "C": "110", "D": "120" },
      "correct_answer": "B"
    },
    {
      "id": 45,
      "difficulty": "hard",
      "question": "Scale: 1 small division = 5 units. A bar ends at 7th small division after 20. Its value? 🔍",
      "options": { "A": "35", "B": "47", "C": "55", "D": "65" },
      "correct_answer": "C"
    },
    {
      "id": 46,
      "difficulty": "hard",
      "question": "In a graph, 3 bars have ratio 2:3:5. Total=200. Find the smallest bar. ➗",
      "options": { "A": "20", "B": "30", "C": "40", "D": "50" },
      "correct_answer": "C"
    },
    {
      "id": 47,
      "difficulty": "hard",
      "question": "If a bar graph is converted to a table, and bar for 'X'= 1.5 times bar for 'Y', and X=75, find Y. 🔄",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "C"
    },
    {
      "id": 48,
      "difficulty": "hard",
      "question": "From a double bar graph: Boys in Class 6=40, Girls=35; Class 7 Boys=45, Girls=40. Total students? 👫",
      "options": { "A": "150", "B": "155", "C": "160", "D": "165" },
      "correct_answer": "C"
    },
    {
      "id": 49,
      "difficulty": "hard",
      "question": "If the range of data in a bar graph is 50 (max-min), and min=30, what is the maximum? 📐",
      "options": { "A": "70", "B": "75", "C": "80", "D": "85" },
      "correct_answer": "C"
    },
    {
      "id": 50,
      "difficulty": "hard",
      "question": "In a graph, if every bar value is multiplied by 3, what happens to the scale? 🔢",
      "options": {
        "A": "Scale multiplies by 3",
        "B": "Scale divides by 3",
        "C": "Scale unchanged",
        "D": "Graph becomes triple bar"
      },
      "correct_answer": "A"
    },
    {
      "id": 51,
      "difficulty": "hard",
      "question": "A bar graph shows runs in 5 matches: 20, x, 40, 50, 30. Average=38. Find x. 🏏",
      "options": { "A": "45", "B": "48", "C": "50", "D": "52" },
      "correct_answer": "C"
    },
    {
      "id": 52,
      "difficulty": "hard",
      "question": "From graph, if the ratio of bar A to bar B is 4:5, and A=48, find B. ⚖️",
      "options": { "A": "50", "B": "55", "C": "60", "D": "65" },
      "correct_answer": "C"
    },
    {
      "id": 53,
      "difficulty": "hard",
      "question": "In a bar graph, the total of all bars is 450. If there are 9 bars, what is the average height? 📊",
      "options": { "A": "45", "B": "50", "C": "55", "D": "60" },
      "correct_answer": "B"
    },
    {
      "id": 54,
      "difficulty": "hard",
      "question": "If a bar is 3.2 cm tall and scale is 2 cm = 25 people, how many people? 👥",
      "options": { "A": "30", "B": "35", "C": "40", "D": "45" },
      "correct_answer": "C"
    },
    {
      "id": 55,
      "difficulty": "hard",
      "question": "In a graph showing profits over 6 months, if profit increased by same amount each month, and first month=10, last month=60, what is the constant increase? 💹",
      "options": { "A": "8", "B": "9", "C": "10", "D": "12" },
      "correct_answer": "C"
    },
    {
      "id": 56,
      "difficulty": "hard",
      "question": "From a double bar graph, difference between boys and girls in Class 8 is 10. If boys=55, find girls. 👦👧",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "B"
    },
    {
      "id": 57,
      "difficulty": "hard",
      "question": "If the median of 5 bars is 35, and values are 20, 30, x, 40, 50, find x. 📶",
      "options": { "A": "35", "B": "40", "C": "45", "D": "50" },
      "correct_answer": "A"
    },
    {
      "id": 58,
      "difficulty": "hard",
      "question": "In a bar graph, if 20% of total value is represented by one bar, and total=250, find that bar's value. 🧮",
      "options": { "A": "40", "B": "45", "C": "50", "D": "55" },
      "correct_answer": "C"
    },
    {
      "id": 59,
      "difficulty": "hard",
      "question": "From graph, if bar for 'Morning' is 1/3 of bar for 'Evening', and Evening=90, find Morning. 🌇",
      "options": { "A": "20", "B": "25", "C": "30", "D": "35" },
      "correct_answer": "C"
    },
    {
      "id": 60,
      "difficulty": "hard",
      "question": "In a bar graph with unequal class intervals, if bar for 0-10 is height 20, and for 10-30 is height 40, which class has higher density? 📊",
      "options": {
        "A": "0-10",
        "B": "10-30",
        "C": "Same",
        "D": "Cannot tell"
      },
      "correct_answer": "C"
    }
  ]
}