{
  "paper": {
    "school": "Catholic High",
    "year": 2022,
    "level": "P2",
    "label": "Checkpoint 1 and 3",
    "source_prefix": "Catholic High 2022 P2 Checkpoint 1 and 3",
    "has_answer_key": true,
    "notes": "PDF contains three sub-papers: Checkpoint 1 (Q1-7), Checkpoint 2 (Q1-10), Checkpoint 3 (Q1-10). Answer key (pp.19-20) covers Checkpoint 1 and Checkpoint 2. The page-21 key is titled 'CLASS TEST 3' (Q1-13) and does NOT match the Checkpoint 3 question pages (Q1-10) in this PDF, so Checkpoint 3 has no usable key and those answers were solved. Manifest numbers all questions sequentially n=1..27; the source field carries the original checkpoint + question number."
  },
  "questions": [
    {
      "n": 1,
      "type_id": 1,
      "question": "How many [?] are there?",
      "answer0": "467",
      "answer1": "557",
      "answer2": "567",
      "answer3": "657",
      "correct_answer": 2,
      "skill_id": 29,
      "difficulty_id": 2,
      "explanation": "Base-ten blocks: 5 flats (hundreds) = 500, 6 longs (tens) = 60, 7 unit cubes = 7. Total = 567.",
      "hints": ["Count the big flat squares as hundreds.", "Count the long rods as tens and the small cubes as ones, then add."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q1",
      "image_needed": true,
      "image_options": false,
      "image_page": 1,
      "image_file": null,
      "notes": "Figure of base-ten blocks (hundreds flats + tens rods + unit cubes). Stem uses a block icon for the counted item; rendered as [?]. Answer key CP1 Q1 = option 3 (567)."
    },
    {
      "n": 2,
      "type_id": 1,
      "question": "In 867, the value of the digit 6 is [?]",
      "answer0": "6",
      "answer1": "60",
      "answer2": "67",
      "answer3": "600",
      "correct_answer": 1,
      "skill_id": 29,
      "difficulty_id": 1,
      "explanation": "In 867 the digit 6 is in the tens place, so its value is 60.",
      "hints": ["Look at which place the digit 6 sits in.", "Tens place value = digit x 10."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key CP1 Q2 = option 2 (60)."
    },
    {
      "n": 3,
      "type_id": 1,
      "question": "Which one of the following numbers is an odd number?",
      "answer0": "217",
      "answer1": "384",
      "answer2": "478",
      "answer3": "580",
      "correct_answer": 0,
      "skill_id": 33,
      "difficulty_id": 1,
      "explanation": "An odd number ends in 1, 3, 5, 7 or 9. Only 217 ends in 7, so 217 is odd.",
      "hints": ["Look at the last digit of each number.", "Even numbers end in 0, 2, 4, 6 or 8."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key CP1 Q3 = option 1 (217)."
    },
    {
      "n": 4,
      "type_id": 1,
      "question": "367 + 231 = [?]",
      "answer0": "498",
      "answer1": "588",
      "answer2": "597",
      "answer3": "598",
      "correct_answer": 3,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "367 + 231 = 598.",
      "hints": ["Add the ones, then tens, then hundreds.", "7 + 1 = 8, 6 + 3 = 9, 3 + 2 = 5."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key CP1 Q4 = option 4 (598)."
    },
    {
      "n": 5,
      "type_id": 2,
      "question": "Arrange the numbers from the smallest to the greatest.\n781, 871, 718",
      "answer0": "718",
      "answer1": "781",
      "answer2": "871",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 31,
      "difficulty_id": 2,
      "explanation": "Compare hundreds then tens: 718 < 781 < 871.",
      "hints": ["Compare the hundreds digit first.", "718 and 781 both start with 7, so compare the tens digit."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Ordering task converted to FIB (smallest to greatest). Answer key CP1 Q5 = 718, 781, 871."
    },
    {
      "n": 6,
      "type_id": 2,
      "question": "Look at the number pattern and complete the pattern.\n830, 820, 810, 800, [?], 780, 770, 760",
      "answer0": "790",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 32,
      "difficulty_id": 1,
      "explanation": "The pattern decreases by 10 each step, so after 800 comes 790.",
      "hints": ["Find the difference between consecutive numbers.", "Each number is 10 less than the one before."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Directional word 'below' stripped. Answer key CP1 Q6 = 790."
    },
    {
      "n": 7,
      "type_id": 2,
      "question": "Subtract 68 from 908.",
      "answer0": "840",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 2,
      "explanation": "908 - 68 = 840.",
      "hints": ["Write it as 908 - 68.", "Regroup: 908 - 68 = 840."],
      "source": "Catholic High 2022 P2 Checkpoint 1 Q7",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Answer key CP1 Q7 = 840."
    },
    {
      "n": 8,
      "type_id": 1,
      "question": "The tree is about [?] tall.",
      "answer0": "1 m",
      "answer1": "3 m",
      "answer2": "3 cm",
      "answer3": "30 m",
      "correct_answer": 1,
      "skill_id": 52,
      "difficulty_id": 2,
      "explanation": "The scale beside the tree shows 1 m. The tree is about 3 times that height, so about 3 m.",
      "hints": ["Use the 1 m scale marked next to the trunk.", "How many of that scale fit the tree's height?"],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q1",
      "image_needed": true,
      "image_options": false,
      "image_page": 5,
      "image_file": null,
      "notes": "Figure: silhouette of a tree with a 1 m scale bar at its base. Directional word 'below' stripped. Answer key CP2 Q1 = option 2 (3 m)."
    },
    {
      "n": 9,
      "type_id": 2,
      "question": "761 + 124 = [?]",
      "answer0": "885",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 34,
      "difficulty_id": 1,
      "explanation": "761 + 124 = 885.",
      "hints": ["Add ones, tens, then hundreds.", "1 + 4 = 5, 6 + 2 = 8, 7 + 1 = 8."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q2",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed as MCQ (options 637/643/885/895) but rendered as a plain computation FIB per spec; correct value 885 = option 3. Answer key CP2 Q2 = option 3 (885)."
    },
    {
      "n": 10,
      "type_id": 1,
      "question": "Which equation best describes the diagram?",
      "answer0": "3 x 5",
      "answer1": "5 + 3",
      "answer2": "5 ÷ 3",
      "answer3": "3 – 5",
      "correct_answer": 0,
      "skill_id": 36,
      "difficulty_id": 2,
      "explanation": "There are 3 groups of dice each showing 5 dots: 3 groups of 5 = 3 x 5.",
      "hints": ["Count the number of equal groups.", "Count how many dots are in each group, then write groups x size."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q3",
      "image_needed": true,
      "image_options": false,
      "image_page": 6,
      "image_file": null,
      "notes": "Figure: three identical dice-pattern panels, each showing 5 dots. Directional word 'above' stripped. Answer key CP2 Q3 = option 1 (3 x 5)."
    },
    {
      "n": 11,
      "type_id": 1,
      "question": "4 x [blank] = 32",
      "answer0": "6",
      "answer1": "8",
      "answer2": "9",
      "answer3": "28",
      "correct_answer": 1,
      "skill_id": 39,
      "difficulty_id": 1,
      "explanation": "4 x 8 = 32, so the missing number is 8.",
      "hints": ["Think of the 4 times table.", "32 ÷ 4 = 8."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Printed MCQ with a blank operand; kept as MCQ (options 6/8/9/28). Answer key CP2 Q4 = option 2 (8)."
    },
    {
      "n": 12,
      "type_id": 0,
      "question": "Circle 8 groups of 3 balls.",
      "answer0": null,
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 36,
      "difficulty_id": 2,
      "explanation": "There are 24 balls (3 rows of 8). Circle them in 8 groups of 3 balls each (8 x 3 = 24).",
      "hints": ["Each circle should enclose exactly 3 balls.", "8 groups of 3 uses 24 balls in total."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q5",
      "image_needed": true,
      "image_options": false,
      "image_page": 7,
      "image_file": null,
      "notes": "Interactive circling task -> type_id 0 (no app type). Figure: 24 soccer balls in 3 rows of 8. Answer: draw 8 circles each around 3 balls. Answer key CP2 Q5 = diagram showing balls grouped into eights (8 columns of 3)."
    },
    {
      "n": 13,
      "type_id": 2,
      "question": "Look at the number pattern and complete the pattern.\n927, 922, 917, [?], 907, 902, 897",
      "answer0": "912",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 32,
      "difficulty_id": 1,
      "explanation": "The pattern decreases by 5 each step, so after 917 comes 912.",
      "hints": ["Find the difference between consecutive numbers.", "Each number is 5 less than the one before."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q6",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Directional word 'below' stripped. Answer key CP2 Q6 = 912."
    },
    {
      "n": 14,
      "type_id": 2,
      "question": "How long is the tube of toothpaste?",
      "answer0": "7",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 50,
      "difficulty_id": 2,
      "explanation": "On the ruler the tube spans from the 1 cm mark to the 8 cm mark, so its length is 8 - 1 = 7 cm.",
      "hints": ["Read where each end of the tube lines up on the ruler.", "Subtract the start reading from the end reading."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q7",
      "image_needed": true,
      "image_options": false,
      "image_page": 8,
      "image_file": null,
      "notes": "Answer is in cm (unit on the answer line). Figure: toothbrush and toothpaste tube above a cm ruler (shared with Q15). Answer key CP2 Q7 = 7 cm."
    },
    {
      "n": 15,
      "type_id": 2,
      "question": "How much longer is the toothbrush than the tube of toothpaste?",
      "answer0": "4",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 53,
      "difficulty_id": 2,
      "explanation": "The toothbrush spans 0 cm to 11 cm = 11 cm. The toothpaste tube is 7 cm. Difference = 11 - 7 = 4 cm.",
      "hints": ["Find the length of the toothbrush from the ruler.", "Subtract the tube length from the toothbrush length."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q8",
      "image_needed": true,
      "image_options": false,
      "image_page": 8,
      "image_file": null,
      "notes": "Answer is in cm (unit on the answer line). Same ruler figure as Q14 (toothbrush 11 cm, tube 7 cm). Answer key CP2 Q8 = 4 cm."
    },
    {
      "n": 16,
      "type_id": 2,
      "question": "372 people visited a carnival on Friday. 29 fewer people visited the carnival on Saturday than on Friday. How many people visited the carnival on Saturday?",
      "answer0": "343",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "Saturday = Friday - 29 = 372 - 29 = 343 people.",
      "hints": ["'Fewer' means subtract.", "372 - 29 = 343."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q9a",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (a) of Q9. Answer key CP2 Q9a = 372 - 29 = 343."
    },
    {
      "n": 17,
      "type_id": 2,
      "question": "372 people visited a carnival on Friday. 29 fewer people visited the carnival on Saturday than on Friday. How many people visited the carnival on Friday and Saturday altogether?",
      "answer0": "715",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "Saturday = 343 (from part a). Altogether = 372 + 343 = 715 people.",
      "hints": ["First find Saturday's number (372 - 29 = 343).", "Add Friday and Saturday: 372 + 343."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q9b",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (b) of Q9. Answer key CP2 Q9b = 372 + 343 = 715."
    },
    {
      "n": 18,
      "type_id": 2,
      "question": "Anne has 18 pencils. She has 2 times as many pencils as Ben. How many pencils does Ben have?",
      "answer0": "9",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 40,
      "difficulty_id": 2,
      "explanation": "Anne has 2 times Ben's pencils, so Ben = 18 ÷ 2 = 9 pencils.",
      "hints": ["Anne's pencils = 2 x Ben's pencils.", "18 ÷ 2 = 9."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q10a",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (a) of Q10. Answer key CP2 Q10a = 18 ÷ 2 = 9."
    },
    {
      "n": 19,
      "type_id": 2,
      "question": "Anne has 18 pencils. She has 2 times as many pencils as Ben. How many pencils do they have altogether?",
      "answer0": "27",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 40,
      "difficulty_id": 2,
      "explanation": "Ben has 9 (from part a). Altogether = 18 + 9 = 27 pencils.",
      "hints": ["First find Ben's pencils (18 ÷ 2 = 9).", "Add Anne's and Ben's: 18 + 9."],
      "source": "Catholic High 2022 P2 Checkpoint 2 Q10b",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "Part (b) of Q10. Answer key CP2 Q10b = 18 + 9 = 27."
    },
    {
      "n": 20,
      "type_id": 1,
      "question": "What is the mass of the packet of milk?",
      "answer0": "350 g",
      "answer1": "360 g",
      "answer2": "370 g",
      "answer3": "380 g",
      "correct_answer": 1,
      "skill_id": 50,
      "difficulty_id": 2,
      "explanation": "The kitchen-scale needle points just past 350 g toward 400 g, reading 360 g.",
      "hints": ["Read where the needle points on the scale.", "The scale is marked in 100 g steps; estimate to the nearest small mark."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q1",
      "image_needed": true,
      "image_options": false,
      "image_page": 11,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3 (page-21 key is for a different 'CLASS TEST 3'). Solved by reading the scale: needle near 360 g (option 2). Figure: kitchen scale with milk packet, dial marked 0-1000 g."
    },
    {
      "n": 21,
      "type_id": 1,
      "question": "The following figure is made up of equal parts. What fraction of the figure is not shaded?",
      "answer0": "3/6",
      "answer1": "6/6",
      "answer2": "3/9",
      "answer3": "6/9",
      "correct_answer": 3,
      "skill_id": 42,
      "difficulty_id": 2,
      "explanation": "The circle is divided into 9 equal parts; 3 parts are shaded, so 6 parts are not shaded = 6/9.",
      "hints": ["Count the total number of equal parts.", "Count the unshaded parts and write unshaded over total."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q2",
      "image_needed": true,
      "image_options": false,
      "image_page": 12,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Solved: circle in 9 equal parts, 3 shaded -> 6/9 unshaded (option 4). Verify shaded/total count against the cropped figure. Figure: circle cut into 9 sectors with 3 shaded."
    },
    {
      "n": 22,
      "type_id": 1,
      "question": "Which of the following fractions is the smallest?",
      "answer0": "1/10",
      "answer1": "5/10",
      "answer2": "3/10",
      "answer3": "8/10",
      "correct_answer": 0,
      "skill_id": 43,
      "difficulty_id": 1,
      "explanation": "All fractions have denominator 10, so the smallest numerator gives the smallest fraction: 1/10.",
      "hints": ["The denominators are all the same.", "The fraction with the smallest numerator is smallest."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q3",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Solved: 1/10 is smallest (option 1)."
    },
    {
      "n": 23,
      "type_id": 2,
      "question": "3/11 + 7/11 = [?]",
      "answer0": "10/11",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 44,
      "difficulty_id": 1,
      "explanation": "Like fractions: add numerators over the common denominator. 3/11 + 7/11 = 10/11.",
      "hints": ["The denominators are the same, so add the numerators.", "3 + 7 = 10, over 11."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q4",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Solved: 10/11."
    },
    {
      "n": 24,
      "type_id": 2,
      "question": "Arrange the following fractions in order. Begin with the greatest fraction.\n1/8, 1/3, 1/5",
      "answer0": "1/3",
      "answer1": "1/5",
      "answer2": "1/8",
      "answer3": null,
      "correct_answer": null,
      "skill_id": 43,
      "difficulty_id": 2,
      "explanation": "With numerator 1, the smaller the denominator the larger the fraction: 1/3 > 1/5 > 1/8.",
      "hints": ["These are unit fractions (numerator 1).", "A smaller denominator means a larger fraction."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q5",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Ordering task -> FIB, greatest first. Solved: 1/3, 1/5, 1/8."
    },
    {
      "n": 25,
      "type_id": 2,
      "question": "Two identical bars of soap are placed on the kitchen scale. Find the mass of each bar of soap.",
      "answer0": "100",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 50,
      "difficulty_id": 3,
      "explanation": "The scale needle points to 200 g for the two identical bars together. Each bar = 200 ÷ 2 = 100 g.",
      "hints": ["Read the total mass shown for both bars.", "Divide the total by 2 because the bars are identical."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q6",
      "image_needed": true,
      "image_options": false,
      "image_page": 14,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3 (page-21 'CLASS TEST 3' key Q6 = 12 cm is unrelated). Answer in g (unit on line). Solved by reading dial at ~200 g total -> 100 g each; verify the needle reading against the cropped figure. Figure: kitchen scale with two soap bars, dial marked in 50 g steps to 500 g."
    },
    {
      "n": 26,
      "type_id": 1,
      "question": "Box A, B, C and D are placed on balances. Which box is the lightest?",
      "answer0": "A",
      "answer1": "B",
      "answer2": "C",
      "answer3": "D",
      "correct_answer": 1,
      "skill_id": 53,
      "difficulty_id": 3,
      "explanation": "Balance 1: C is higher than B, so B is lighter than C. Balance 2: C is higher than D, so D is lighter than C. Balance 3: D is higher than A, so A is heavier than D. Combining: B < C, D < C, A > D. The box that is lighter than everything compared is B (B < C, and on the lightest side throughout). B is the lightest.",
      "hints": ["On a balance, the box that tips up is lighter.", "Compare the results of all three balances to find the box that is always lighter."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q7",
      "image_needed": true,
      "image_options": false,
      "image_page": 14,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Word answer (a letter) -> MCQ with options A/B/C/D. Solved from the three balance diagrams; B is the lightest (option 2). Figure: three balance scales comparing B<C, C>D... arrangement (B up vs C; C up vs C... actually B-C, C-D, D-A). Verify tilt directions against the cropped figure before finalising."
    },
    {
      "n": 27,
      "type_id": 2,
      "question": "There are a total of 40 pupils in a class. There are 23 boys in the class. How many more boys than girls are there in the class?",
      "answer0": "6",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "Girls = 40 - 23 = 17. More boys than girls = 23 - 17 = 6.",
      "hints": ["First find the number of girls (40 - 23).", "Then subtract girls from boys."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q8",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Solved: 40 - 23 = 17 girls; 23 - 17 = 6 more boys."
    },
    {
      "n": 28,
      "type_id": 2,
      "question": "Bag A has a mass of 8 kg. Bag B is twice as heavy as Bag A. What is the total mass of the two bags?",
      "answer0": "24",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 54,
      "difficulty_id": 2,
      "explanation": "Bag B = 2 x 8 = 16 kg. Total = 8 + 16 = 24 kg.",
      "hints": ["Bag B is twice Bag A's mass.", "Add Bag A and Bag B together."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q9",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Answer in kg (unit on line). Solved: B = 16 kg, total = 24 kg."
    },
    {
      "n": 29,
      "type_id": 2,
      "question": "Jane has 398 stickers. May has 147 more stickers than Jane. How many stickers do they have altogether?",
      "answer0": "943",
      "answer1": null,
      "answer2": null,
      "answer3": null,
      "correct_answer": null,
      "skill_id": 35,
      "difficulty_id": 2,
      "explanation": "May = 398 + 147 = 545. Altogether = 398 + 545 = 943 stickers.",
      "hints": ["First find May's stickers (398 + 147).", "Add Jane's and May's stickers together."],
      "source": "Catholic High 2022 P2 Checkpoint 3 Q10",
      "image_needed": false,
      "image_options": false,
      "image_file": null,
      "notes": "No usable answer key for Checkpoint 3. Solved: May = 545, total = 398 + 545 = 943."
    }
  ]
}