[
  {
    "index": 1536,
    "id": 9730,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If sales on Saturday were 25% more than Friday's sales, how many cones would be sold on Saturday? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeh...",
    "image": "questions/37d258e2076d5c03.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1537,
    "id": 9731,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": 0,
    "answers": [
      "34",
      "24",
      null,
      null
    ],
    "question_preview": "What are the highest and lowest temperature recorded during the week? | Highest : [...] type=\"number\" class=\"lineinput\" placeholder=\"?\"> ℃ | Answer : ...",
    "image": "questions/031b7ff8a3d0f21f.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 34 (highest), 24 (lowest). Match between chunk JSON and solution file."
  },
  {
    "index": 1538,
    "id": 9733,
    "type": 1,
    "verdict": "GOOD",
    "correct_index": 2,
    "answers": [
      "\\(\\frac{3}{7}\\)",
      "\\(\\frac{4}{7}\\)",
      "\\(\\frac{5}{7}\\)",
      "\\(\\frac{6}{7}\\)"
    ],
    "question_preview": "The air conditioning turns on when the temperature exceeds 27°C. | On what fraction of the days was the air conditioning running?",
    "image": "questions/5cc5d6720e73b319.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 5/7 (fraction of days). Match between chunk JSON and solution file."
  },
  {
    "index": 1539,
    "id": 9734,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If the temperature on the following Monday is expected to be 15% lower than this Sunday's temperature, what will the expected temperature be? [...] mi...",
    "image": "questions/ebc0d914449c8999.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1540,
    "id": 9735,
    "type": 1,
    "verdict": "NEEDS_REVISION",
    "correct_index": 0,
    "answers": [
      "1",
      "1",
      "1",
      "1"
    ],
    "question_preview": "What is the average temperature for the weekdays (Monday to Friday) compared to the weekend (Saturday and Sunday)? Which period was warmer on average?",
    "image": "questions/be3d117f7a47a2b1.webp",
    "solution": null,
    "hints_count": 0,
    "note": "MCQ options are placeholder values (all \"1\"). Real options and correct_answer must be set."
  },
  {
    "index": 1541,
    "id": 9736,
    "type": 1,
    "verdict": "NEEDS_REVISION",
    "correct_index": 0,
    "answers": [
      "1",
      "1",
      "1",
      "1"
    ],
    "question_preview": "For how many days was the temperature above the weekly average? What percentage of the week does this represent?",
    "image": "questions/0b94154f46d98db4.webp",
    "solution": null,
    "hints_count": 0,
    "note": "MCQ options are placeholder values (all \"1\"). Real options and correct_answer must be set."
  },
  {
    "index": 1542,
    "id": 9740,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "By what percentage did the rainfall decrease from January to June? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/6980ee0be5b7c2e3.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1543,
    "id": 9742,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The library charges a late fee of \\$0.50 per book. | If 10% of borrowed books in May were returned late, how much did the library collect in late fees...",
    "image": "questions/a9eaba5f09850c13.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1544,
    "id": 9743,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What is the percentage decrease in book borrowings from March to April? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/6ca8cf0a8a226e72.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1545,
    "id": 9744,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What is the percentage decrease in book borrowings from March to April? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/de7fae95f6477748.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1546,
    "id": 9745,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": null,
    "answers": [
      "2",
      null,
      null,
      null
    ],
    "question_preview": "The librarian's target is for borrowings to increase by at least 20 books each month. In how many months was this target met?Answer : [...] min=\"0\" ty...",
    "image": "questions/5ff9ab0524b222d6.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 2 (months met target). Match between chunk JSON and solution file."
  },
  {
    "index": 1547,
    "id": 9748,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What is the percentage increase in visitors from Monday to Saturday? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/32cfaffa112db9a8.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1548,
    "id": 9751,
    "type": 1,
    "verdict": "NEEDS_REVISION",
    "correct_index": 0,
    "answers": [
      "1",
      "1",
      "1",
      "1"
    ],
    "question_preview": "The website's target is to have an average of at least 450 visitors per day over the week. | Did they meet this target? By how many visitors per day d...",
    "image": "questions/2c3f05a67e392ea7.webp",
    "solution": null,
    "hints_count": 0,
    "note": "MCQ options are placeholder values (all \"1\"). Real options and correct_answer must be set."
  },
  {
    "index": 1549,
    "id": 9753,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What is the percentage decrease in consumption from January to April? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/6a6d3917c4f68ef9.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1550,
    "id": 9756,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What is the difference between the average consumption in the first 4 months and the last 4 months? [...] min=\"0\" type=\"number\" class=\"lineinput\" plac...",
    "image": "questions/f34c2015f87a701c.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1551,
    "id": 9757,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If the household installs solar panels that reduce consumption by 35%, what would August's consumption become? [...] min=\"0\" type=\"number\" class=\"line...",
    "image": "questions/6b2845e4297bbf67.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1552,
    "id": 9761,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If consumption in September follows the same trend as July to August, what would September's consumption be? [...] min=\"0\" type=\"number\" class=\"linein...",
    "image": "questions/7f4cd1a869c92942.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1553,
    "id": 9762,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The household wants to reduce their total annual consumption by 15% compared to this 8-month period. | What should their target total be for the remai...",
    "image": "questions/797530a34eeaa191.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1554,
    "id": 9768,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": null,
    "answers": [
      "18",
      null,
      null,
      null
    ],
    "question_preview": "A market stall sells fruits on Monday, Tuesday and Wednesday every week. The chart shows 1 particular week. | How many kg of Pears were sold on Wednes...",
    "image": "questions/aea73b162d17019f.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 18 (kg of pears). Match between chunk JSON and solution file."
  },
  {
    "index": 1555,
    "id": 9772,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What percentage of the total Banana sales occurred on Tuesday? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/9f5c77d18f9cd078.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1556,
    "id": 9773,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The market stall owner wants to increase total weekly sales by 20%. | If the current total sales across all fruits is calculated, what should the new ...",
    "image": "questions/9df1a90f14064e27.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1557,
    "id": 9774,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "On Thursday, each fruit's sales dropped by 25% compared to Wednesday's sales. | What would be the combined sales of Apples, Oranges, and Bananas on Th...",
    "image": "questions/3ffbfe263d960985.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1558,
    "id": 9782,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If Tom maintains his Week 8 distance for the next 4 weeks, what will be his average weekly distance over all 12 weeks? | Answer : [...] min=\"0\" type=\"...",
    "image": "questions/2759220602962461.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1559,
    "id": 9831,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": null,
    "answers": [
      "5050",
      null,
      null,
      null
    ],
    "question_preview": "How many widgets were produced in March? | Answer : [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/4520c0c2286faf68.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 5050 (March production). Match between chunk JSON and solution file."
  },
  {
    "index": 1560,
    "id": 9832,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": null,
    "answers": [
      "1700",
      null,
      null,
      null
    ],
    "question_preview": "What is the difference between highest monthly production and lowest monthly volume? | Answer : [...] min=\"0\" type=\"number\" class=\"lineinput\" placehol...",
    "image": "questions/3b44955fa4b55b47.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 1700 (highest-lowest). Match between chunk JSON and solution file."
  },
  {
    "index": 1561,
    "id": 9833,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": null,
    "answers": [
      "500",
      null,
      null,
      null
    ],
    "question_preview": "How many more widgets were produced in January than in February? | Answer : [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/acc25ff941869bcf.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 500 (Jan-Feb difference). Match between chunk JSON and solution file."
  },
  {
    "index": 1562,
    "id": 9835,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The graph shows monthly widget production at Apex Factory. | Find the percentage increase in production from February to May. | [...] min=\"0\" type=\"nu...",
    "image": "questions/408289d956434741.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1563,
    "id": 9837,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Production in March was 120% of a planned target. | What was the planned target for March, and if April achieved only 95% of its target, what was Apri...",
    "image": "questions/52e7c48a62b08161.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1564,
    "id": 9838,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If defect rates were 5% in Q1 and 3% in Q2, how many total non-defective widgets were produced over the six months? [...] min=\"0\" type=\"number\" class=...",
    "image": "questions/47497c5e25dabc9b.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1565,
    "id": 9839,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What percentage of the 2015 ice mass remained by 2024? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/5ae63a8dcfb1c701.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1566,
    "id": 9841,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Calculate the average heart rate increase per kilometre for the first 10 km versus the last 10 km (32-42 km). | [...] min=\"0\" type=\"number\" class=\"lin...",
    "image": "questions/045c739308d0443c.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1567,
    "id": 9842,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "By what percentage did the runner's heart rate increase from resting (0 km) to the finish (42 km)? [...] min=\"0\" type=\"number\" class=\"lineinput\" place...",
    "image": "questions/56fee68b5d589099.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1568,
    "id": 9843,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The runner's maximum heart rate capacity is 200 bpm. | Heart rate reserve = max capacity - resting rate. | What percentage of the heart rate reserve w...",
    "image": "questions/8845f743bdf06e6a.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1569,
    "id": 9844,
    "type": 1,
    "verdict": "GOOD",
    "correct_index": 2,
    "answers": [
      "40 to 42",
      "10 to 15",
      "0 to 5",
      "25 to 30"
    ],
    "question_preview": "Between which two consecutive measurement points did the heart rate increase the most?",
    "image": "questions/36a3169da6e8dcbe.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 0 to 5 (steepest HR increase). Match between chunk JSON and solution file."
  },
  {
    "index": 1570,
    "id": 9846,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What was the average growth per hour over the entire 12-hour period? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/6d2f806a47b380bd.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1571,
    "id": 9848,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What percentage of the total growth occurred in the last 4 hours (8-12)? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/5eb78fd0f5ad83b5.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1572,
    "id": 9849,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What was the average battery drain per hour over the 8-hour period? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/a99775b9ba9882ed.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1573,
    "id": 9851,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The user wants at least 20% battery to make an emergency call. | At what hour should they stop using the phone and save it for emergencies? [...] min=...",
    "image": "questions/520bd22f6bd6fbe2.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1574,
    "id": 9852,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "At what time did the battery first drop below 50%? How many hours of use remained from that point? [...] min=\"0\" type=\"number\" class=\"lineinput\" place...",
    "image": "questions/7b4eb911f891b884.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1575,
    "id": 9856,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What percentage of the total daily sales occurred during the 9am rush hour? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/fcfbae1ae123328b.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1576,
    "id": 9858,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Calculate the average hourly sales. | How many hours had sales below average? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/5903a9cf4444deba.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1577,
    "id": 9861,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What percentage of the original water level (day 1) remained on day 28? If this rate of loss continued into September, on what day would the level fal...",
    "image": "questions/af26929110c3beed.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1578,
    "id": 9866,
    "type": 1,
    "verdict": "GOOD",
    "correct_index": 1,
    "answers": [
      "Day 25 to 28",
      "Day 7 to 10",
      "Day 19 to 22",
      "Day 1 to 4"
    ],
    "question_preview": "Calculate the water loss for each 3-day interval. | Which interval had the greatest loss?",
    "image": "questions/68039382ef759bae.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: Day 7 to 10 (greatest water loss). Match between chunk JSON and solution file."
  },
  {
    "index": 1579,
    "id": 9868,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Calculate the average water level for all readings before the refill (days 1-13) and after the refill (days 16-28). | What is the difference between t...",
    "image": "questions/a582f0f456bc6df3.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1580,
    "id": 9869,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The water level dropped from 180 cm to 148 cm before the refill. | What percentage of this total drop was recovered by the refill on day 16? [...] min...",
    "image": "questions/c25a1e4ac6232af2.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1581,
    "id": 9871,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Compare the rate of water loss (cm per day) between days 7-10 and days 19-22. | Express the faster rate as a percentage of the slower rate. | [...] mi...",
    "image": "questions/d8951bf13eb3801c.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1582,
    "id": 9872,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "If the pool had not been refilled and water continued to drop at the average rate from days 10-13, what would the water level have been on day 28? How...",
    "image": "questions/74ebc85afee1390d.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1583,
    "id": 9873,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The pool owner estimates that 60% of water loss is from evaporation and 40% is from splash-out during swimming. | Between days 1 and 13, how many cm w...",
    "image": "questions/af35bc7391a675a9.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1584,
    "id": 9883,
    "type": 2,
    "verdict": "GOOD",
    "correct_index": null,
    "answers": [
      "800",
      null,
      null,
      null
    ],
    "question_preview": "The subscriber count dropped in two months. | What was the total number of subscribers lost during these drops? | Answer : [...] min=\"0\" type=\"number\"...",
    "image": "questions/e605f83df63037ab.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer verified from chart: 800 (subscriber loss). Match between chunk JSON and solution file."
  },
  {
    "index": 1585,
    "id": 9885,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "What was the percentage increase in subscribers from January to December? [...] min=\"0\" type=\"number\" class=\"lineinput\" placeholder=\"?\">",
    "image": "questions/acc727cebb4bd61d.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1586,
    "id": 9886,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Calculate the average monthly subscriber count. | In which month did the channel first exceed this average? [...] min=\"0\" type=\"number\" class=\"lineinp...",
    "image": "questions/f281f658ec1abaee.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1587,
    "id": 9889,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The student earns \\$800 per month from a part-time job. | In months where the balance increased, what was the average percentage of income saved? Assu...",
    "image": "questions/3a14509d263a58a1.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1588,
    "id": 9890,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Find the ratio of average monthly balance in the first half (Jan-Jun) to the second half (Jul-Dec). | Express as a simplified fraction. | [...] min=\"0...",
    "image": "questions/ac8ea0fbda8e51b8.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1589,
    "id": 9891,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The student's goal was to save \\$3000 by November. | By what percentage did they exceed or fall short of this goal? If they had saved consistently eac...",
    "image": "questions/ffdda24fbfc13d85.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1590,
    "id": 9892,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "The student wants to buy a \\$4000 laptop. They can either: (A) continue at December's growth rate, or (B) increase savings by 20% each month from Dece...",
    "image": "questions/b53f3cee47a469bf.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1591,
    "id": 9893,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Express April's balance (the first dip) as a percentage of December's balance. | Then express August's balance (the second dip) as a percentage of the...",
    "image": "questions/3fb00e486c562116.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1592,
    "id": 9894,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Calculate the average daily steps for weekdays (Mon-Fri) and weekends (Sat-Sun). | How many more steps per day were walked on weekends compared to wee...",
    "image": "questions/9d1e679ba43bee5c.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1593,
    "id": 9897,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Express Friday's step count as a percentage of Saturday's step count. | By what percentage did the step count increase from Friday to Saturday? [...] ...",
    "image": "questions/bbccd978fa3539bb.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  },
  {
    "index": 1594,
    "id": 9898,
    "type": 2,
    "verdict": "NEEDS_REVISION",
    "correct_index": null,
    "answers": [
      "1",
      null,
      null,
      null
    ],
    "question_preview": "Assuming an average stride length of 0.75 metres, calculate the total distance walked during the week in kilometres. | On which day was the distance c...",
    "image": "questions/d8b00a150d28126a.webp",
    "solution": null,
    "hints_count": 0,
    "note": "Answer not populated (placeholder). Chart data must be extracted and answer filled in."
  }
]