{ "paper": { "school": "Singapore Chinese Girls' School", "year": 2022, "level": "P5", "label": "Weighted Assessment 1", "source_prefix": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1", "has_answer_key": true }, "questions": [ { "n": 1, "type_id": 1, "question": "Which of the following is twenty-four thousand and thirty in numerals?", "answer0": "2430", "answer1": "24 030", "answer2": "240 030", "answer3": "2 400 030", "correct_answer": 1, "skill_id": 149, "difficulty_id": 1, "explanation": "Twenty-four thousand = 24 000, and thirty = 30. So the number is 24 000 + 30 = 24 030.", "hints": ["Write twenty-four thousand as 24 000.", "Add thirty (30) to it."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q1", "image_needed": false, "image_options": false, "image_file": null, "notes": "Section A MCQ. Printed key: option 2 (24 030)." }, { "n": 2, "type_id": 1, "question": "\\(3\\,000\\,000 + 1000 + 60 + 2 =\\) [blank]", "answer0": "3 001 062", "answer1": "3 001 620", "answer2": "3 010 062", "answer3": "3 010 620", "correct_answer": 0, "skill_id": 149, "difficulty_id": 1, "explanation": "3 000 000 + 1 000 + 60 + 2 = 3 001 062. There are no hundred-thousands, ten-thousands or hundreds, so those places are 0.", "hints": ["Line up each value by place value.", "The hundred-thousands, ten-thousands and hundreds places are 0."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q2", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: option 1 (3 001 062)." }, { "n": 3, "type_id": 1, "question": "Alyssa earns $200 a day. She works 4 days each week for 12 weeks. How much money will Alyssa earn in total?", "answer0": "$800", "answer1": "$2400", "answer2": "$4800", "answer3": "$9600", "correct_answer": 3, "skill_id": 152, "difficulty_id": 2, "explanation": "Days worked = 4 \\(\\times\\) 12 = 48 days. Total earnings = 48 \\(\\times\\) $200 = $9600.", "hints": ["First find the total number of days worked.", "Multiply the total days by $200."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q3", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: option 4 ($9600)." }, { "n": 4, "type_id": 1, "question": "Mrs Tan baked 56 cookies on Monday morning and 24 cookies in the afternoon. She baked the same number of cookies on Tuesday. Which of the following represents the total number of cookies Mrs Tan baked on both days?", "answer0": "\\(56 + 24 \\times 2\\)", "answer1": "\\((56 \\times 2) + 24\\)", "answer2": "\\(56 + (24 \\times 2)\\)", "answer3": "\\((56 + 24) \\times 2\\)", "correct_answer": 3, "skill_id": 155, "difficulty_id": 2, "explanation": "Cookies baked on Monday = 56 + 24. The same number is baked on Tuesday, so the total over both days = (56 + 24) \\(\\times\\) 2.", "hints": ["Find the total for one day first (morning + afternoon).", "Both days are equal, so multiply the daily total by 2."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q4", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: option 4, (56 + 24) \\u00d7 2." }, { "n": 5, "type_id": 2, "question": "(a) Find the value of \\(90\\,000 \\div 30\\). [?]
(b) Fill in the blank. \\(850\\,000 \\div 50 = \\) [?] \\(\\times 5\\)", "answer0": "3000", "answer1": "3400", "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 151, "difficulty_id": 2, "explanation": "(a) 90 000 \\(\\div\\) 30 = 3000. (b) 850 000 \\(\\div\\) 50 = 17 000. Then 17 000 = (blank) \\(\\times\\) 5, so the blank = 17 000 \\(\\div\\) 5 = 3400.", "hints": ["For (a), divide 90 000 by 30.", "For (b), work out the left side first, then divide by 5."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q5", "image_needed": false, "image_options": false, "image_file": null, "notes": "Section B. Printed key: (a) 3000; (b) 3400." }, { "n": 6, "type_id": 2, "question": "Find the value of \\(160 - 120 \\div 4 \\times 3 + 7\\). [?]", "answer0": "77", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 155, "difficulty_id": 2, "explanation": "Following order of operations: 120 \\(\\div\\) 4 = 30, 30 \\(\\times\\) 3 = 90. Then 160 - 90 + 7 = 70 + 7 = 77.", "hints": ["Do division and multiplication before addition and subtraction.", "120 \\u00f7 4 \\u00d7 3 = 90, then 160 \\u2212 90 + 7."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q6", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: 77." }, { "n": 7, "type_id": 2, "question": "A clothing company has 20 different designs of t-shirts. Each year, the company makes 3500 of each design of the t-shirts. How many t-shirts does the company make each year? [?]", "answer0": "70000", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 151, "difficulty_id": 1, "explanation": "Total t-shirts = 20 designs \\(\\times\\) 3500 each = 70 000.", "hints": ["Multiply the number of designs by the number made of each.", "20 \\u00d7 3500 = 70 000."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q7", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: 3500 \\u00d7 20 = 70 000." }, { "n": 8, "type_id": 2, "question": "Sally saved $200 in January. Her father gave her $10 for every $40 she saved. How much money did Sally's father give her? [?]", "answer0": "50", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 152, "difficulty_id": 2, "explanation": "$200 \\(\\div\\) $40 = 5 groups of $40. Father gives $10 per group, so 5 \\(\\times\\) $10 = $50.", "hints": ["Find how many $40 are in $200.", "Multiply that by $10."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q8", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: 200 \\u00f7 40 = 5, 5 \\u00d7 10 = $50. Money answer." }, { "n": 9, "type_id": 2, "question": "Mrs Lim had 30 boxes of oranges. Each box contained 20 oranges. She threw 80 rotten oranges away and sold the rest at $10 for 4 oranges. How much money did Mrs Lim receive? [?]", "answer0": "1300", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 152, "difficulty_id": 3, "explanation": "Total oranges = 30 \\(\\times\\) 20 = 600. After throwing away rotten ones: 600 - 80 = 520. Groups of 4 = 520 \\(\\div\\) 4 = 130. Money received = 130 \\(\\times\\) $10 = $1300.", "hints": ["Find the total oranges, then subtract the rotten ones.", "Group the rest in fours; each group sells for $10."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q9", "image_needed": false, "image_options": false, "image_file": null, "notes": "Section C. Printed key: 30\\u00d720=600, 600\\u221280=520, 520\\u00f74=130, 130\\u00d710=$1300. Money answer." }, { "n": 10, "type_id": 2, "question": "Joyce had 260 more stickers than Ali. After Joyce gave away 44 stickers to her friends, she had five times as many stickers as Ali. How many stickers did Joyce have at first? [?]", "answer0": "314", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 152, "difficulty_id": 3, "explanation": "After giving away 44, Joyce has 5 units and Ali has 1 unit, a difference of 4 units. This difference = 260 - 44 = 216, so 1 unit = 216 \\(\\div\\) 4 = 54. Joyce after giving away = 5 \\(\\times\\) 54 = 270. Joyce at first = 270 + 44 = 314.", "hints": ["The difference of 4 units equals 260 \\u2212 44.", "Find Joyce's amount after, then add back the 44 given away."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q10", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: 4u = 260\\u221244 = 216, 1u = 54, Joyce = 5\\u00d754 = 270, +44 = 314." }, { "n": 11, "type_id": 2, "question": "Mr Rahmat had a total of 480 exercise books and files in his shop. He sold half of the exercise books and 105 files. In the end, he had an equal number of exercise books and files left. Find the number of files he had at first. [?]", "answer0": "230", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 152, "difficulty_id": 3, "explanation": "After selling, the books left (half the original books) equal the files left (original files minus 105). Working from the key: 480 - 105 = 375; 375 \\(\\div\\) 3 = 125 (the equal amount left); files at first = 125 + 105 = 230.", "hints": ["He keeps half the exercise books and (files \\u2212 105) files, and these are equal.", "Use 480 \\u2212 105, then divide by 3."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q11", "image_needed": false, "image_options": false, "image_file": null, "notes": "Printed key: 480\\u2212105=375, 375\\u00f73=125, 125+105=230 files at first." }, { "n": 12, "type_id": 2, "question": "Mr Jaya spent a total of $4200 buying some headphones and speakers for his shop. He bought 40 more headphones than speakers. A headphone cost $30 each and a speaker cost $20 each. How many headphones did he buy altogether? [?]", "answer0": "100", "answer1": null, "answer2": null, "answer3": null, "correct_answer": null, "skill_id": 152, "difficulty_id": 3, "explanation": "Let the number of speakers be u; headphones = u + 40. The 40 extra headphones cost 40 \\(\\times\\) $30 = $1200. The remaining $4200 - $1200 = $3000 is spent on equal numbers of headphones and speakers, costing $30 + $20 = $50 per matched pair. So u = 3000 \\(\\div\\) 50 = 60 speakers. Headphones = 60 + 40 = 100.", "hints": ["Set aside the cost of the 40 extra headphones first.", "The rest pays for equal numbers at $50 per headphone-speaker pair."], "source": "Singapore Chinese Girls' School 2022 P5 Weighted Assessment 1 Q12", "image_needed": true, "image_options": false, "image_file": "q12.png", "image_page": 5, "image_bbox": [0.18, 0.14, 0.60, 0.27], "image_loc": "below the question, two labelled boxes: Headphone $30 each and Speaker $20 each with pictures", "notes": "Printed key: 50u = 4200\\u22121200 = 3000, 1u = 60, headphones = 60+40 = 100. The price-label pictures are decorative; prices are also in the stem." } ] }