Primary 5 April Review 3

Transcription

1 Primary 5 April Review 3 50 Section A: 10 Questions, 15 marks Questions 1 to Questions 5 carry 1 mark each. Questions 6 to Questions 10 carry 2 marks each. Choose the correct answer and write it in the bracket provided. Calculators are not allowed in this section. 1. Find the value of (1) 5 (2) 7 (3) 39 (4) 62 ( ) 2. How many eighths are there in? (1) 6 (2) 11 (3) 22 (4) 48 ( ) 3. 6 : 8 = (1) 4 : 3 (2) 9 : 12 (3) 10 : 15 (4) 12 : 20 ( ) 4. Find the value of 3 +. (1) (2) (3) (4) ( ) 1 P5/Apr/Review3

2 5. A ribbon is cut into two pieces in the ratio 1 : 5. The shorter piece is 13 cm. Find the length of the longer piece. (1) 78 cm (2) 65 cm (3) 52 cm (4) 26 cm ( ) 6. The graph below shows the temperature of water over a period of time Temperature ( C) Time (minutes) The temperature of the water after 1 minute is 40 C. How much longer will it take to reach 80 C? (1) 1 minute (2) 2 minutes (3) 3 minutes (4) 4 minutes ( ) 7. The ratio of the number of $10-notes to the number of $5-notes is 3 : 2. If six $5-notes were exchanged for the same number of $10-notes, the number of $10-notes will be 4 times the number of $5-notes. How much more is the total value of the $10-notes than that of the $5-notes? (1) $6 (2) $60 (3) $120 (4) $180 ( ) 2 P5/Apr/Review3

3 8. Mr Ong made some pies. He sold of them in the morning and of the remainder in the afternoon. He had 48 pies left. How many more pies did he sell in the morning than in the afternoon? (1) 192 (2) 96 (3) 64 (4) 30 ( ) 9. Clock A is set to chime once every 4 minutes while Clock B is set to chime once every 10 minutes. At 12 p.m., both clocks chimed together. What is the next timing when both clocks chime together again? (1) p.m. (2) p.m. (3) p.m. (4) a.m. ( ) 10. Which one of the unit shapes below does not tessellate? (1) (2) (3) (4) ( ) Section B: 10 Questions, 15 marks Questions 11 to 15 carry 1 mark each. Questions 16 to 20 carry 2 marks each. Show your mathematical statements clearly in the space provided and write your answers in the blank provided. No calculator is allowed in this section. 11. Write in words. Ans: 3 P5/Apr/Review3

4 12. Express as a decimal. Ans: 13. Find the product of 430 and 27. Ans: 14. Arrange these fractions in increasing order. Ans: 4 P5/Apr/Review3

5 15. Mr Chan had 100 mangoes. He sold 45 of them at $6 each. He sold the rest at $4 each. How much did he receive from selling all the mangoes? Ans: $ 16. A group of children carried 2030 books to a library. Each boy carried 5 books and each girl carried 3 books. The boys carried 200 more books than the girls. How many children were there? Ans: children 17. The ratio of the number of red roses to the number of pink roses is 7 : 1. There are a total of 112 roses. How many more red roses than pinks roses are there? Ans: 5 P5/Apr/Review3

6 18. A number consists of 3 different digits. The first and third digits of the number are both exactly divisible by 2. The third digit of the number is twice the value of its second digit. The first digit is 1 more than the second digit. What is the number? Ans: 19. Joel took h to finish his Science assignment. He took h longer than the time taken to complete his Science assignment to complete his Chinese assignment. How long did Joel take to complete all his assignments? Express your answer in its simplest form. Ans: h times as many children as adults attended a fund-raising concert. A child s ticket cost $4 and an adult s ticket cost $7. A total of $5520 was collected. How many people attended the concert? Ans: people 6 P5/Apr/Review3

7 Section C: 6 Questions, 20 marks For Questions 21 to 26, show your steps in the space provided for each question and write your answers in the spaces provided. The marks for each question is shown in the [ ] at the end of the question. Calculators can be used in this section. 21. The total cost of 8 pens and 5 books is $172. The total cost of 2 pens and 2 books is $52. Find the total cost of 9 pens and 8 books. Ans: [2] 22. The total age of Madam Lim and her son is 44 years now. 6 years from now, Madam Lim will be 3 times as old as her son. What is Madam Lim s age now? Ans: [2] 7 P5/Apr/Review3

8 23. Kevin and Laura share a packet of plums in the ratio 9 : 2. If Kevin gives Laura 42 plums from his share, they will have the same number of plums. How many plums does Kevin have at first? Ans: [3] 24. A 3 m-long pole is painted red, blue and green in the ratio 2 : 3 : 5. Then each coloured piece is cut into 5 small parts equally. (a) Find the total length of the green piece at first? (b) What is the difference between each red piece and each green piece after they are cut? Ans: (a) [2] (b) [2] 8 P5/Apr/Review3

9 25. In a bag, there were red, yellow and blue marbles. There were twice as many red marbles as yellow marbles and twice as many yellow marbles as blue marbles at first. After removing 15 blue marbles and some yellow marbles from the bag, the number of red marbles became thrice that of the yellow marbles but the number of yellow marbles was still twice that of the blue marbles. What was the total number of marbles in the bag at first? Ans: [4] 9 P5/Apr/Review3

10 26. The number of marbles in Box A, Box B and Box C was 195. Jerry added 60 marbles to Box A, doubled the number of marbles in Box B and halved the number of marbles in Box C. the ratio of the number of marbles in Box A to the number of marbles in Box B to the number of marbles in Box C then became 4 : 1 : 2. What is the total number of marbles in the 3 boxes in the end? Ans: [5] 10 P5/Apr/Review3