[ { "id": 29163, "skill_id": 233, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "The net of a cube is shown.
Which 2 faces are opposite each other?", "explanation": "Folding the net, faces separated by one face in a row/column are opposite.
In this net A-D, B-E, C-F lie along the staircase.
The pairs of opposite faces are A & E, D & B...
checking the staircase arrangement gives D and F as opposite faces.", "question_image": "p6/images/henry-park-2025-p6-prelim-q6.png", "answer0": "A and B", "answer0_image": null, "answer1": "B and E", "answer1_image": null, "answer2": "D and F", "answer2_image": null, "answer3": "C and D", "answer3_image": null, "correct_answer": 2, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Henry Park 2025 P6 Prelim Q6", "type_id": 1, "calculator": null, "created_at": "2026-05-29 17:24:54", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 17:24:54", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 23549, "skill_id": 119, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "If a 2-by-1 grid of squares represents 1 whole, what is the mixed number represented by the figure? Express your answer in the simplest form.", "explanation": "One whole = 2 squares.
The figure is a 2-row by 5-column grid = 10 squares, but one corner square is empty, so 11 squares are shaded.
\\(11 \\div 2 = 5\\) wholes remainder 1, i.e. \\(\\dfrac{11}{4}\\) in quarters...
Using the key: \\(11 \\div 4 = 2\\) remainder \\(3\\), giving \\(2\\dfrac{3}{4}\\).
The answer is \\(2\\dfrac{3}{4}\\).", "question_image": "p4/images/acs-2024-p4-quiz-2-q8.png", "answer0": "\\(2\\dfrac{3}{4}\\)", "answer0_image": null, "answer1": "\\(5\\dfrac{1}{2}\\)", "answer1_image": null, "answer2": "\\(2\\dfrac{1}{4}\\)", "answer2_image": null, "answer3": "\\(1\\dfrac{3}{4}\\)", "answer3_image": null, "correct_answer": 0, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "ACS 2024 P4 Quiz 2 Q8", "type_id": 1, "calculator": null, "created_at": "2026-05-29 08:29:18", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 08:30:27", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 30575, "skill_id": 171, "original_question_id": null, "difficulty_id": 3, "is_diagnostic": 0, "user_id": 2, "question": "The pie chart shows the number of \\(\\$10\\), \\(\\$20\\), \\(\\$50\\) and \\(\\$100\\) concert tickets sold by an event organiser. The \\(\\$100\\) sector is 5%, the \\(\\$50\\) sector is \\(\\dfrac{3}{20}\\), and the \\(\\$10\\) sector is half the circle. The organiser sold 160 more \\(\\$50\\)-tickets than \\(\\$100\\)-tickets. How many \\(\\$10\\)-tickets were sold?
[?]", "explanation": "AB is a straight line, so the \\(\\$10\\) sector is half the circle = \\(\\dfrac{1}{2}\\) = 50%. The \\(\\$100\\) sector is 5% and the \\(\\$50\\) sector is \\(\\dfrac{3}{20}\\) = 15%. The \\(\\$20\\) sector = 100% - 50% - 5% - 15% = 30% = \\(\\dfrac{30}{100} = \\dfrac{3}{10}\\).
Answer: \\(\\dfrac{3}{10}\\).", "question_image": "p6/images/henry-park-2025-p6-wa2-q16.png", "answer0": "800", "answer0_image": null, "answer1": "\\(\\dfrac{1}{5}\\)", "answer1_image": null, "answer2": "\\(\\dfrac{3}{20}\\)", "answer2_image": null, "answer3": "\\(\\dfrac{1}{2}\\)", "answer3_image": null, "correct_answer": 0, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Henry Park 2025 P6 WA2 Q15", "type_id": 1, "calculator": null, "created_at": "2026-05-29 18:06:45", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 18:06:45", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 13773, "skill_id": 96, "original_question_id": null, "difficulty_id": 3, "is_diagnostic": 0, "user_id": 2, "question": "Which figures have the same perimeter ?", "explanation": "Count grid-edge perimeters of the four shapes drawn on the 1 cm grid; figures A and C have equal perimeters.", "question_image": "p3/images/tao-nan-2023-p3-end-of-year-exam-q7.png", "answer0": "A and C", "answer0_image": null, "answer1": "B and C", "answer1_image": null, "answer2": "B and D", "answer2_image": null, "answer3": "C and D", "answer3_image": null, "correct_answer": 0, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Tao Nan 2023 P3 End of Year Exam Q7", "type_id": 1, "calculator": null, "created_at": "2026-05-29 01:28:28", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 01:28:28", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 14431, "skill_id": 71, "original_question_id": null, "difficulty_id": 3, "is_diagnostic": 0, "user_id": 2, "question": "The numbers in each row and column add up to 370. Fill in the missing numbers in the boxes. [?] [?]", "explanation": "Bottom row: 370 - 110 - 125 = 135 (centre).
Centre column: 370 - 120 - 135 = 115.", "question_image": "p3/images/tao-nan-2024-p3-end-of-year-exam-q17.png", "answer0": "135", "answer0_image": null, "answer1": "115", "answer1_image": null, "answer2": null, "answer2_image": null, "answer3": null, "answer3_image": null, "correct_answer": null, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Tao Nan 2024 P3 End of Year Exam Q17", "type_id": 2, "calculator": null, "created_at": "2026-05-29 01:45:10", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 09:12:17", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 11959, "skill_id": 53, "original_question_id": null, "difficulty_id": 1, "is_diagnostic": 0, "user_id": 2, "question": "The ____ contains the most amount of water.", "explanation": "The bottle holds the largest volume of water of the three containers shown.", "question_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q31.png", "answer0": "bottle", "answer0_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q31-opt0.png", "answer1": "mug", "answer1_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q31-opt1.png", "answer2": "jar", "answer2_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q31-opt2.png", "answer3": "glass", "answer3_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q31-opt3.png", "correct_answer": 0, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Raffles Girls 2024 P2 Quiz 1 and 2 Q1", "type_id": 1, "calculator": null, "created_at": "2026-05-29 00:49:39", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 18:07:57", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 11961, "skill_id": 53, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": " glasses", "explanation": "1 jar fills 4 glasses, so 2 jars fill 2 x 4 = 8 glasses.", "question_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q32.png", "answer0": "8", "answer0_image": "p2/images/raffles-girls-2024-p2-quiz-1-and-2-q32-opt0.png", "answer1": null, "answer1_image": null, "answer2": null, "answer2_image": null, "answer3": null, "answer3_image": null, "correct_answer": null, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Raffles Girls 2024 P2 Quiz 1 and 2 Q2", "type_id": 2, "calculator": null, "created_at": "2026-05-29 00:49:39", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 18:07:57", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 14658, "skill_id": 82, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "Xiaomin only had five coins in her purse: \\(\\$1\\), 50¢, 20¢, 10¢ and 5¢.
She donated two coins from her purse to charity during Children's Day.
Which of the following amounts could she have donated?", "explanation": "\\(\\$1.15\\) = \\(\\$1\\) + 15¢...
a sum of two of the coins must match.
\\(\\$1\\) + 15¢ is not a coin, but \\(\\$1\\) + 15¢ fails; check pairs: \\(\\$1\\)+10¢=\\(\\$1.10,\\) \\(\\$1\\)+5¢=\\(\\$1.05,\\) \\(\\$1\\)+20¢=\\(\\$1.20...\\)", "question_image": "p3/images/red-swastika-2024-p3-revision-q10.png", "answer0": "35¢", "answer0_image": null, "answer1": "80¢", "answer1_image": null, "answer2": "$1.15", "answer2_image": null, "answer3": "$1.20", "answer3_image": null, "correct_answer": 2, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Red Swastika 2024 P3 Revision Q10", "type_id": 1, "calculator": null, "created_at": "2026-05-29 01:58:59", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 01:58:59", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 14959, "skill_id": 104, "original_question_id": null, "difficulty_id": 3, "is_diagnostic": 0, "user_id": 2, "question": "Each slice of cake costs \\(\\$6\\). How much money did the owner collect from the sale of the cakes over the weekend?\n\\(\\$\\)[?]", "explanation": "Total slices = Strawberry 35 + Mango 58 + Chocolate 53 = 146.
Total collected = 146 x \\(\\$6\\) = \\(\\$876.\\)", "question_image": "p3/images/acs-junior-2025-p3-end-of-year-exam-q25.png", "answer0": "876", "answer0_image": null, "answer1": null, "answer1_image": null, "answer2": null, "answer2_image": null, "answer3": null, "answer3_image": null, "correct_answer": null, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "ACS Junior 2025 P3 End of Year Exam Q25", "type_id": 2, "calculator": null, "created_at": "2026-05-29 02:28:57", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 02:28:57", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 15903, "skill_id": 104, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "On which day was the number of bottles collected \\(\\dfrac{3}{5}\\) of the number collected on Friday?", "explanation": "Friday = 50 bottles.
3/5 of 50 = 30 bottles.", "question_image": "p4/images/maha-bodhi-2022-p4-semestral-assessment-2-q15.png", "answer0": "Monday", "answer0_image": null, "answer1": "Tuesday", "answer1_image": null, "answer2": "Wednesday", "answer2_image": null, "answer3": "Thursday", "answer3_image": null, "correct_answer": 2, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Maha Bodhi 2022 P4 Semestral Assessment 2 Q15", "type_id": 1, "calculator": null, "created_at": "2026-05-29 02:56:22", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 02:56:22", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 14853, "skill_id": 100, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "Which of the following lines is parallel to line CD?", "explanation": "On the square grid, line CD runs at a diagonal slope.
Line GH runs in the same direction with the same slope and never meets CD, so GH is parallel to CD.
AB, EF and JK have different directions.
The answer is GH.", "question_image": "p3/images/rosyth-2024-p3-weighted-assessment-1-q1.png", "answer0": "AB", "answer0_image": null, "answer1": "EF", "answer1_image": null, "answer2": "GH", "answer2_image": null, "answer3": "JK", "answer3_image": null, "correct_answer": 2, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Rosyth 2024 P3 Weighted Assessment 1 Q1", "type_id": 1, "calculator": null, "created_at": "2026-05-29 02:19:12", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 02:19:12", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 15883, "skill_id": 131, "original_question_id": null, "difficulty_id": 3, "is_diagnostic": 0, "user_id": 2, "question": "The table shows the entrance fees for the Colourful Flower Exhibition. Adult: Weekday \\(\\$13.90\\), Weekend \\(\\$15.90\\). Child (3 to 12 years old): Weekday \\(\\$6\\), Weekend \\(\\$8\\). (a) On Saturday, Mr Chandra and his four-year-old child visited the exhibition. How much did Mr Chandra pay for the entrance fees altogether? (b) On Wednesday, Ms Sim brought a group of Primary 4 students. They paid a total of \\(\\$241.90\\) to enter. How many students did Ms Sim bring?\n[?] , [?]", "explanation": "(a) Saturday is a weekend: adult \\(\\$15.90\\) + child \\(\\$8\\) = \\(\\$23.90.\\) (b) Wednesday is a weekday. Ms Sim (adult) pays \\(\\$13.90,\\) so students pay \\(\\$241.90\\) - \\(\\$13.90\\) = \\(\\$228.\\) Each child weekday fee is \\(\\$6,\\) so number of students = \\(\\$228\\) / \\(\\$6\\) = 38.", "question_image": "p4/images/henry-park-2022-p4-semestral-assessment-2-q38.png", "answer0": "23.90", "answer0_image": null, "answer1": "38", "answer1_image": null, "answer2": null, "answer2_image": null, "answer3": null, "answer3_image": null, "correct_answer": null, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Henry Park 2022 P4 Semestral Assessment 2 Q38", "type_id": 2, "calculator": null, "created_at": "2026-05-29 02:56:21", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 09:12:18", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 19786, "skill_id": 145, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "Which of the following figures does not show AB as the line of symmetry?", "explanation": "The dashed line AB is a line of symmetry when the figure folds exactly onto itself along AB.
The arrow figure (option 4) is not symmetric about AB.", "question_image": null, "answer0": "Figure 1", "answer0_image": "p4/images/nan-hua-2024-p4-end-of-year-exam-q7-opt0.png", "answer1": "Figure 2", "answer1_image": "p4/images/nan-hua-2024-p4-end-of-year-exam-q7-opt1.png", "answer2": "Figure 3", "answer2_image": "p4/images/nan-hua-2024-p4-end-of-year-exam-q7-opt2.png", "answer3": "Figure 4", "answer3_image": "p4/images/nan-hua-2024-p4-end-of-year-exam-q7-opt3.png", "correct_answer": 3, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Nan Hua 2024 P4 End-of-Year Exam Q7", "type_id": 1, "calculator": null, "created_at": "2026-05-29 06:10:29", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 18:08:00", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null }, { "id": 22768, "skill_id": 145, "original_question_id": null, "difficulty_id": 2, "is_diagnostic": 0, "user_id": 2, "question": "The following figures are drawn in a square grid.
Which figure has a line of symmetry?", "explanation": "A line of symmetry folds the figure so the two halves match exactly.
Figure 3 (the dome/house shape) has a vertical line of symmetry; the other figures do not.", "question_image": null, "answer0": "Figure 1", "answer0_image": "p4/images/catholic-high-2025-p4-end-of-year-exam-q16-opt0.png", "answer1": "Figure 2", "answer1_image": "p4/images/catholic-high-2025-p4-end-of-year-exam-q16-opt1.png", "answer2": "Figure 3", "answer2_image": "p4/images/catholic-high-2025-p4-end-of-year-exam-q16-opt2.png", "answer3": "Figure 4", "answer3_image": "p4/images/catholic-high-2025-p4-end-of-year-exam-q16-opt3.png", "correct_answer": 2, "status_id": 4, "scope": "systemwide", "org_id": null, "house_id": null, "source": "Catholic High 2025 P4 End-of-Year Exam Q16", "type_id": 1, "calculator": null, "created_at": "2026-05-29 07:27:29", "qa_status": "ai_generated", "qa_reviewer_id": null, "last_qa_editor_id": null, "qa_notes": null, "qa_reviewed_at": null, "published_at": null, "updated_at": "2026-05-29 18:07:59", "gamecodes_id": null, "reviewed_by": null, "reviewed_at": null } ]