Question

Give me question on ratio for primary 5

Answer 1

Here are 12 ratio questions suitable for Primary 5, from easy to slightly harder. Answers and short methods are given after each question.

1) Write the ratio 6 : 3 in simplest form.
Answer: 2 : 1 (divide both by 3)

2) The ratio of apples to bananas is 3 : 4. If there are 12 apples, how many bananas are there?
Answer: 16 bananas (4/3 × 12 = 16)

3) A bag has red and blue marbles in the ratio 5 : 2. If there are 21 marbles in total, how many are red?
Answer: 15 red (5/(5+2) × 21 = 15)

4) Simplify the ratio 14 : 35.
Answer: 2 : 5 (divide both by 7)

5) Share $72 between A and B in the ratio 3 : 5. How much does each get?
Answer: A gets $27, B gets $45 (total parts 8, unit = 72/8 = 9; 3×9 and 5×9)

6) Boys : Girls = 7 : 8. If there are 21 girls, how many boys are there?
Answer: 18 boys (7/8 × 21 = 18)

7) A recipe needs sugar : flour = 1 : 3. If you use 250 g of sugar, how much flour do you need?
Answer: 750 g flour (3 × 250)

8) Which is larger: 3 : 4 or 4 : 5?
Answer: 4 : 5 is larger (3/4 = 0.75, 4/5 = 0.8)

9) In a park the ratio of cats to dogs is 5 : 6. If there are 55 animals in total, how many dogs are there?
Answer: 30 dogs (6/(5+6) × 55 = 30)

10) A number is split in the ratio 2 : 3. The difference between the two parts is 15. What is the total number?
Answer: 75 (parts 2k and 3k, difference k = 15, total = 5k = 75)

11) Three friends share money in the ratio 2 : 3 : 5. If the largest share is $150, what is the total shared?
Answer: $300 (largest = 5 parts = $150 → 1 part = $30 → total 10 parts = $300)

12) The length and width of a rectangle are in the ratio 3 : 2. If the width is 10 cm, find the length.
Answer: 15 cm (length = 3/2 × 10 = 15)

If you want, I can:
- make more questions,
- give only word problems,
- provide worksheets with mixed practice, or
- include step-by-step solutions for selected problems. Which would you like?