National 3 Applications of Mathematics
Ratio Answer Sheet
Use this sheet to check final answers. Pupils should still show working where needed.
- 1
Simplify the ratio 16:24:20.
Answer: 4:6:5
- 2
A map scale is 1 cm:3 km. What real distance is shown by 3 cm?
Answer: 9 km
- 3
The ratio of red counters to blue counters is 3:8. There are 24 red counters. How many blue counters are there?
Answer: 64
- 4
A recipe uses 150 g of flour. How much flour is needed to double the recipe?
Answer: 300 g
- 5
Simplify the ratio 21:33.
Answer: 7:11
- 6
A recipe uses flour and oats in the ratio 2:1. How many cups of oats are needed for 10 cups of flour?
Answer: 5 cups
- 7
10 counters are shared in the ratio 2:3. How many counters are in each share?
Answer: 4 and 6
- 8
Share £20.00 in the ratio 2:3.
Answer: £8.00 and £12.00
- 9
Write an equivalent ratio to 5:6 by multiplying each part by 2.
Answer: 10:12
- 10
18 counters are shared in the ratio 2:1. How many counters are in each share?
Answer: 12 and 6