Math 7 · Unit 12: Ratio and proportion · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Copy and complete the following.

   Fill the blanks with these.

   • 90
   • 40
   • 100
   • 60
   • 300
   • 120
   • 12
   • 10
   • 4
   Check

2. 2. Copy and complete the following.

   Fill the blanks with these.

   • 5
   • 8
   • 64
   • 24
   • 40
   • 10
   • 13
   • 16
   • 3
   Check

3. 3. Copy and complete the following. Use the unitary method. Two drinks cost $3. How much do seven drinks cost?

   Fill the blanks with these.

   • 21
   • 1.5
   • 6
   • 10.5
   Check

4. 4. Copy and complete the following. Five grapes weigh 60 g. How much do four grapes weigh?

   Fill the blanks with these.

   • 4
   • 12
   • 48
   • 10
   • 5
   • 15
   Check

5. 5. Question 5a: Tara goes to the gym three times a week. How many times does she go in three weeks?

   • 9
   • 6
   • 3
   • 12
   Check

6. 6. Question 5b: Tara goes to the gym three times a week. How many times does she go in one year?

   • 104
   • 36
   • 156
   • 365
   Check

7. 7. Copy and complete the workings to find the mass of seven potatoes. The mass of four potatoes is 500 g.

   Fill the blanks with these.

   • 125
   • 875
   • 100
   • 700
   Check

8. 8. Question 7a: the mass of five pieces of bacalhau is 900 g. Work out the mass of one piece.

   • 4500 g
   • 150 g
   • 180 g
   • 895 g
   Check

9. 9. Question 7b: the mass of five pieces of bacalhau is 900 g. Work out the mass of seven pieces.

   • 1200 g
   • 1440 g
   • 1080 g
   • 1260 g
   Check

10. 10. Question 8: Hank pays $22.50 for five people to go 10-pin bowling. How much does it cost for seven people?

    • $31.50
    • $35.00
    • $27.00
    • $24.50
    Check

11. 11. Question 9: a recipe uses 400 g of onion for five people. How many grams of onion are needed for three people?

    • 320 g
    • 240 g
    • 80 g
    • 120 g
    Check

12. 12. Question 10a: Melissa is paid $56 for 8 hours of work. How much does she earn when she works for 4 hours?

    • $7
    • $32
    • $28
    • $112
    Check

13. 13. Question 10b: Melissa is paid $56 for 8 hours of work. How much does she earn when she works for 12 hours?

    • $96
    • $84
    • $60
    • $112
    Check

14. 14. Question 11a: a money exchange shop exchanges £100 for €166. How many euros does it exchange for £50?

    • €116
    • €33.20
    • €166
    • €83
    Check

15. 15. Question 11b: £100 = €166. How many euros does it exchange for £250?

    • €332
    • €398
    • €415
    • €416
    Check

16. 16. Question 12: a recipe for four people uses 280 g of potatoes. Eduardo says 10 people need 420 g, because 4 + 2 = 6 and 280 + 140 = 420. What is the correct answer?

    • 700 g
    • 2800 g
    • 560 g
    • 420 g
    Check

17. 17. A carpenter buys 40 identical pieces of wood. The total value of the wood is $300. The carpenter makes a mistake in his measuring, so he then buys eight extra pieces of wood. He works out that the total value of the wood is now $375. Is he correct? Explain your answer.

    • Yes
    • No
    Check

18. 18. Question 14: a shop has bags of chips on offer. Offer 1: 3 bags for 85 cents. Offer 2: 7 bags for $1.75. Offer 3: 15 bags for $3.99. Which offer is the best value for money?

    • They are all the same.
    • Offer 3: 26.6 cents a bag
    • Offer 1: 28 cents a bag
    • Offer 2: 25 cents a bag
    Check

19. 19. Question 15: a businessman buys 3 tonnes of rice for $3600. He sells the rice for $1.60 per kg. How much profit does he make per kilogram?

    • $0.60
    • $1200
    • $0.40
    • $1.20
    Check

20. 20. Question 16: a washing machine is made from plastic and metal in the ratio 4 : 5. The mass of five washing machines is 360 kg. What is the mass of metal in eight washing machines?

    • 576 kg
    • 200 kg
    • 256 kg
    • 320 kg
    Check