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Class 8 Mathematics questions and answers on ratio
What is the ratio 3:5 expressed as a decimal?
A. 1.6
B. 0.625
C. 0.6
D. 0.375
(1m 48s)
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1.
To plaster a house, sand and cement were mixed in the ratio 5:1. If 24 bags of cement each weighing 50 kg were used, how much was the amount of sand used in tonnes? A. 1.2 B. 6 C. 4.8 D. 60
2.
Mumbua and Njeri each made a 20 kg mixture of maize and beans. Mumbua mixed the maize and beans in the ratio 3:2. Njeri mixed the maize and beans in the ratio 1:3. How many more kilograms of beans did Njeri use than Mumbua? A. 15 B. 12 C. 8 D. 7
3.
A blanket is made by joining 80 squares of 3 different colours; blue, green and yellow in the ratio 2:3:5 respectively. One ball of wool is used to make four such squares. How many balls of green wool are used for one blanket? A. 4 B. 6 C. 10 D. 20
4.
A painter mixed blue and yellow powder so that their weights were in the ratio 3:2. The total weight of the mixture was 30kg. What was the weight, in kilograms of the yellow powder used? A. 6 B. 12 C. 18 D. 20
5.
There were 420 people attending a meeting. The ratio of men to women was 3:4. Later 60 men and 40 women left the meeting. What was the ratio of men to women who remained? A. 3:2 B. 3:5 C. 7:9 D. 6:7
6.
The ratio of sheep to goats to cows is 3:5:2. There are 36 cows. What is the total number of goats and sheep? A. 180 B. 144 C. 90 D. 54
7.
The ratio of boys to girls in a school is 7:8. If there are 168 boys, how many pupils are there in the school? A. 360 B. 147 C. 192 D. 315
8.
In a farm Wambui had goats, sheep and cows in the ratio 5:3:2. At the beginning, she had 50 animals but later sold some of them leaving her with 36. If the number of goats, sheep and cows that remained were in the ratio 2:1:1, how many sheep did he sell? A. 14 B. 6 C. 9 D. 15
9.
A sum of money was shared between M’mukindia and Ntonyiri in the ratio 3:7. If Ntonyiri got sh 12 more than M’mukindia, how much did M’mukindia get? A. Sh 30 B. Sh 21 C. Sh 18 D. Sh 9
10.
In a school the ratio of boys to girls is 3:2. There are 400 pupils in the school. During an athletics competition,#frac{1}{8}# of the girls took part. How many girls did not take part? A. 140 B. 20 C. 210 D. 160
11.
The ration of the weights of two boys is 2:3. If the lighter boy weighs 36kg, what is the difference in the weights of the two boys? A. 18kg B. 12kg C. 54kg D. 90kg
12.
Achieng and Cheromo shared some money in the ratio 4:5 respectively. Cheromo got sh 6 more than Achieng. How much money did Achieng get? A. Sh 24 B. Sh 30 C. Sh 48 D. Sh 54
13.
The ratio of girls to boys in a school is 3:2. If there are 120 more girls than boys, how many boys are there in school? A. 600 B. 400 C. 360 D. 240
14.
What is the ratio 3:5 expressed as a decimal? A. 1.6 B. 0.625 C. 0.6 D. 0.375
15.
In a group of 126 spectators the ratio of men to women was 3:4. What is the new ratio if 2 more men and 8 more women joined the group of spectators? A. 7:10 B. 5:12 C. 13:16 D. 1:4
16.
Mbogo and Kihara shared some money such that Mbogo got #frac{3}{4}# of the money shared out. What was the ratio of Mbogo’s share to that of Kihara? A. 4:3 B. 3:1 C. 3:4 D. 1:3
17.
Auma and Maina shared the profit from the sale of fish in the ratio 3:4. If the profit was sh 8400, how much money did Auma get? A. Sh 3600 B. Sh 4800 C. Sh 6300 D. Sh 1120
18.
In a class the ratio of the number of boys to girls is 2:3. What is the percentage of the number of boys in the class? A. #33frac{1}{2}# % B. 40% C. 60% D. #66frac{2}{3}# %
19.
Mutiso and Oluoch shared the profit of their business such that Mutiso got #frac{3}{5}# of the profit. What was the ratio of Mutiso’s share to Oluoch’s share? A. 3:2 B. 5:3 C. 3:5 D. 2:3
20.
In the year 2008 there were 850 pupils in a school of whom #frac{3}{5}# were boys. In the year 2009, ten girls joined the school and twenty boys transferred to another school. What was the ratio of boys to girls in the school in the year 2009? A. 3:2 B. 53:33 C. 13:8 D. 7:5
21.
Mwachia and Mbuu shared some money in the ratio 5:2. Mbuu received sh 30 less than Mwachia. How much money did Mbuu get? A. Sh 20 B. Sh 50 C. Sh 70 D. Sh 80
22.
Akello and Muhu shared some oranges in the ratio 4:5 respectively. Muhu received 3 more oranges than Akello. How many oranges did Akello get? A. 9 B. 12 C. 15 D. 27
23.
In a school the ratio of boys to girls is 3:2. There are 600 pupils in the school. During an athletic competition #frac{1}{6}# of the girls and #frac{1}{5}# of the boys took part. How many pupils took part in the competition? A. 448 B. 288 C. 200 D. 112
24.
What is the simplest form of the ratio: #6(frac{1}{3}-frac{1}{4})#:#(frac{1}{2}+frac{1}{3})#? A. 3:5 B. 5:3 C. 6:10 D. 21:10
25.
The pupil population of certain school was 900. The ratio of boys to girls was 5:4. One day 5% of the girls and 2 % of the boys went for a competition. How many pupils remained in the school on that day? A. 603 B. 837 C. 867 D. 870
26.
In a certain school, the number of girls was 240 and the total number of pupils was 540. What is the ratio of boys to girls in the school? A. 9:4 B. 5:9 C. 4:5 D. 5:4
27.
Which one of the following represents the ratio 2:5 expressed as a percentage? A. #28frac{4}{7}# % B. 40% C. #71frac{3}{7}# % D. 250%
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