{
  "paper": {
    "school": "ACS Junior",
    "year": 2025,
    "level": "P3",
    "label": "Weighted Assessment 3",
    "source_prefix": "ACS Junior 2025 P3 Weighted Assessment 3",
    "has_answer_key": true
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "What is this marked angle called?",
      "answer0": "right angle",
      "answer1": "acute angle",
      "answer2": "obtuse angle",
      "answer3": "Y-angle",
      "correct_answer": 1,
      "skill_id": 99,
      "difficulty_id": 1,
      "explanation": "The marked angle is narrow, less than a right angle (90 degrees), so it is an acute angle. Answer key: 2.",
      "hints": ["A right angle is exactly 90 degrees.", "An angle smaller than a right angle is acute; larger is obtuse."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q1",
      "image_needed": true,
      "image_options": false,
      "image_file": "q1.png",
      "image_page": 3,
      "image_bbox": [0.24, 0.25, 0.42, 0.36],
      "image_loc": "small narrow angle drawn below the question stem, upper-left",
      "notes": "Answer key: 2 (acute angle)."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "The fraction is made up of 8 identical triangles. What fraction of the figure is shaded?",
      "answer0": "1/2",
      "answer1": "1/4",
      "answer2": "2/3",
      "answer3": "2/6",
      "correct_answer": 1,
      "skill_id": 77,
      "difficulty_id": 1,
      "explanation": "2 of the 8 identical triangles are shaded, so 2/8 = 1/4 of the figure is shaded. Answer key: 2.",
      "hints": ["Shaded triangles over total triangles gives the fraction.", "2 out of 8 simplifies to 1/4."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q2",
      "image_needed": true,
      "image_options": false,
      "image_file": "q2.png",
      "image_page": 3,
      "image_bbox": [0.28, 0.5, 0.46, 0.63],
      "image_loc": "triangle/trapezium figure of 8 triangles below the question, two shaded",
      "notes": "Answer key: 2 (1/4). 2 of 8 triangles shaded."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "The figure is made up of 2 squares. Which of the following sentences is true?",
      "answer0": "AB // FG",
      "answer1": "BC // CD",
      "answer2": "CD perpendicular to EF",
      "answer3": "EH perpendicular to GH",
      "correct_answer": 3,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "EFGH is the outer square; EH is a vertical side and GH is the bottom side, which meet at a right angle, so EH is perpendicular to GH. Answer key: 4.",
      "hints": ["Adjacent sides of a square meet at right angles (perpendicular).", "Parallel lines never meet; perpendicular lines meet at 90 degrees."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q3",
      "image_needed": true,
      "image_options": false,
      "image_file": "q3.png",
      "image_page": 4,
      "image_bbox": [0.32, 0.16, 0.66, 0.33],
      "image_loc": "outer square EFGH with inner square ABCD, near top of page",
      "notes": "Answer key: 4 (EH perpendicular to GH)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "Which of the following fractions is greater than 1/2?",
      "answer0": "2/5",
      "answer1": "3/7",
      "answer2": "4/8",
      "answer3": "5/9",
      "correct_answer": 3,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "A fraction exceeds 1/2 when the numerator is more than half the denominator. 5/9 > 4.5/9 = 1/2. The others are 1/2 or less (2/5, 3/7 less; 4/8 equals 1/2). Answer key: 4.",
      "hints": ["Compare each numerator to half its denominator.", "4/8 equals 1/2 exactly, so it is not greater."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 4 (5/9)."
    },
    {
      "n": 5,
      "type_id": 1,
      "question": "What is the missing fraction in the box? 6/10 + [box] = 1",
      "answer0": "2/5",
      "answer1": "3/5",
      "answer2": "4/5",
      "answer3": "6/10",
      "correct_answer": 0,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "1 - 6/10 = 4/10 = 2/5. So the missing fraction is 2/5. Answer key: 1.",
      "hints": ["The two parts must add to one whole (10/10).", "10/10 - 6/10 = 4/10, then simplify."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 1 (2/5)."
    },
    {
      "n": 6,
      "type_id": 1,
      "question": "Which of the following is true?",
      "answer0": "2/9 > 5/9",
      "answer1": "5/6 < 2/3",
      "answer2": "1/8 > 1/11",
      "answer3": "3/4 = 6/12",
      "correct_answer": 2,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "For unit-type fractions with equal numerator, the smaller denominator is the larger fraction, so 1/8 > 1/11 is true. 2/9 < 5/9; 5/6 > 2/3; 3/4 = 9/12 not 6/12. Answer key: 3.",
      "hints": ["With the same numerator, a smaller denominator means a larger fraction.", "Check each statement by making like denominators."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 3 (1/8 > 1/11)."
    },
    {
      "n": 7,
      "type_id": 1,
      "question": "Identify and name a pair of parallel lines in the diagram.",
      "answer0": "AB // CD",
      "answer1": "AE // ED",
      "answer2": "BC // BE",
      "answer3": "AB // BC",
      "correct_answer": 0,
      "skill_id": 100,
      "difficulty_id": 1,
      "explanation": "The arrows on AB and CD mark them as parallel, so AB // CD. Answer key: AB // CD.",
      "hints": ["Matching single arrows on two lines mean those lines are parallel.", "Parallel lines stay the same distance apart and never meet."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q7",
      "image_needed": true,
      "image_options": false,
      "image_file": "q7.png",
      "image_page": 6,
      "image_bbox": [0.26, 0.3, 0.66, 0.49],
      "image_loc": "house-shaped figure with apex E over rectangle ABCD, arrows on AB and DC",
      "notes": "Answer key: AB // CD. Converted to MCQ (line-naming is a label, exact-match FIB fragile)."
    },
    {
      "n": 8,
      "type_id": 2,
      "question": "The figure is made up of identical rectangles. David wants to shade 3/4 of the figure. How many more parts must he shade? [?]",
      "answer0": "4",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 81,
      "difficulty_id": 2,
      "explanation": "There are 8 parts. 3/4 = 6/8, so 6 parts must be shaded. 2 are already shaded, so 6 - 2 = 4 more parts. Answer key: 4 parts.",
      "hints": ["Express 3/4 with denominator 8 (the number of parts).", "Subtract the parts already shaded from the parts needed."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q8",
      "image_needed": true,
      "image_options": false,
      "image_file": "q8.png",
      "image_page": 6,
      "image_bbox": [0.24, 0.66, 0.82, 0.74],
      "image_loc": "horizontal strip of 8 identical rectangles, first and seventh shaded",
      "notes": "Answer key: 4 parts. 8 total parts, 2 already shaded, need 6 for 3/4."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "Arrange the following fractions in order. Begin with the greatest. 3/8, 1/4, 5/10 [?], [?], [?]",
      "answer0": "5/10",
      "answer1": "3/8",
      "answer2": "1/4",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 79,
      "difficulty_id": 2,
      "explanation": "Convert to a common denominator (40): 3/8 = 15/40, 1/4 = 10/40, 5/10 = 20/40. Greatest to least: 5/10, 3/8, 1/4. Answer key: 5/10, 3/8, 1/4.",
      "hints": ["Use a common denominator to compare.", "5/10 = 1/2 is the largest; 1/4 the smallest."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 5/10, 3/8, 1/4 (greatest first). Three blanks in order."
    },
    {
      "n": 10,
      "type_id": 0,
      "question": "Using the square grid, draw a line that is perpendicular to the line XY. The line must pass through the point D.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 101,
      "difficulty_id": 2,
      "explanation": "Draw a line through D at right angles (perpendicular) to XY. Since XY runs diagonally down-right, the perpendicular through D runs diagonally down-left, meeting XY at 90 degrees.",
      "hints": ["A perpendicular line meets XY at a right angle.", "On the grid, the perpendicular has the opposite diagonal slope."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q10",
      "image_needed": true,
      "image_options": false,
      "image_file": "q10.png",
      "image_page": 7,
      "image_bbox": [0.26, 0.38, 0.82, 0.73],
      "image_loc": "square grid with diagonal line XY and point D marked above",
      "notes": "Interactive draw task (no value answer) - type_id 0, skipped on insert. Answer: line through D perpendicular to XY."
    },
    {
      "n": 11,
      "type_id": 2,
      "question": "How many marked angles inside the figure shown are bigger than a right angle? [?]",
      "answer0": "2",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 99,
      "difficulty_id": 2,
      "explanation": "Compare each marked interior angle to a right angle (90 degrees). Two of the marked angles are obtuse (greater than 90 degrees). Answer key: 2 angles.",
      "hints": ["An angle bigger than a right angle is obtuse (more than 90 degrees).", "Check each marked angle against a square corner."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q11",
      "image_needed": true,
      "image_options": false,
      "image_file": "q11.png",
      "image_page": 8,
      "image_bbox": [0.28, 0.18, 0.76, 0.34],
      "image_loc": "irregular arrow-like polygon with several marked interior angles",
      "notes": "Answer key: 2 angles. Count of obtuse marked angles."
    },
    {
      "n": 12,
      "type_id": 2,
      "question": "5 chairs cost as much as 3 tables. A table cost $90. What is the cost of 1 chair? [?]",
      "answer0": "54",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 2,
      "explanation": "3 tables cost 3 x $90 = $270. This equals the cost of 5 chairs, so 1 chair = $270 / 5 = $54. Answer key: $54.",
      "hints": ["Find the total cost of 3 tables first.", "Divide that total by 5 chairs."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q12",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: $54. Answer entered as a value (unit $ shown on paper)."
    },
    {
      "n": 13,
      "type_id": 0,
      "question": "The picture shows a playground. (a) Complete the perpendicular line statement. (b) Line [?] and Line [?] are horizontal lines. (c) Line [?] and Line [?] are vertical lines.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 100,
      "difficulty_id": 2,
      "explanation": "(a) AB is perpendicular to BC. (b) Line FG and Line JH are horizontal lines. (c) Line FJ and Line GH are vertical lines.",
      "hints": ["Horizontal lines run left-right; vertical lines run up-down.", "Perpendicular lines meet at a right angle."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q13",
      "image_needed": true,
      "image_options": false,
      "image_file": "q13.png",
      "image_page": 9,
      "image_bbox": [0.18, 0.24, 0.84, 0.52],
      "image_loc": "playground frame with labelled lines (B-C top, A-K bottom, rings D-E, bars F,G,J,H)",
      "notes": "Multi-part with a fill-in line-naming format (letter labels, not numeric) plus a perpendicular-statement sub-part; line-label answers are fragile for exact-match FIB, so type_id 0 (skipped on insert). Answer key: (a) AB perpendicular BC; (b) FG and JH horizontal; (c) FJ and GH vertical."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "Ming has some eggs. Crystal has twice as many eggs as Ming. Rahim has 3 times as many eggs as Crystal. Rahim has 320 more eggs than Crystal. How many eggs do they have altogether? [?]",
      "answer0": "720",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 76,
      "difficulty_id": 3,
      "explanation": "Let Ming = 1 unit. Crystal = 2 units, Rahim = 3 x Crystal = 6 units. Rahim - Crystal = 6u - 2u = 4u = 320, so 1u = 80. Total = 1u + 2u + 6u = 9u = 9 x 80 = 720. Answer key: 720.",
      "hints": ["Let Ming be 1 unit and write the others in units.", "Rahim minus Crystal is 4 units = 320, so 1 unit = 80."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q14",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 720 eggs. Units: Ming 1, Crystal 2, Rahim 6; 4u=320."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "Sonia used 120 g of sugar to bake an almond cake. She used 25 g of almond powder less than the amount of sugar used. She used 4 times as much flour as the amount of almond powder used. What was the mass of flour Sonia used? [?]",
      "answer0": "380",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 87,
      "difficulty_id": 3,
      "explanation": "Almond powder = 120 g - 25 g = 95 g. Flour = 4 x 95 g = 380 g. Answer key: 380 g.",
      "hints": ["Find the almond powder mass first (25 g less than sugar).", "Multiply the almond powder mass by 4 for the flour."],
      "source": "ACS Junior 2025 P3 Weighted Assessment 3 Q15",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key: 380 g. Almond powder 95 g, flour = 4 x 95."
    }
  ]
}