CBSE Class 8 Mathematics Proportional Reasoning 2 MCQs Set 10

Question. Triangle side lengths are in ratio 3 : 4 : 5. If smallest side is 3 cm, the largest side is
(a) 3 cm
(b) 4 cm
(c) 5 cm
(d) 12 cm

Answer: C

Question. In 110 units concrete, gravel needed is
(a) 20 units
(b) 30 units
(c) 60 units
(d) 100 units

Answer: C

Question. To divide 100 in ratio 4:3:2:1, the first part is
(a) 10
(b) 40
(c) 30
(d) 20

Answer: B

Question. In the chair problem, if chairs in a row increase, number of rows will
(a) Increase
(b) Decrease
(c) Stay same
(d) Become zero

Answer: B

Question. A school has 8 periods of 45 minutes each. Total school time in minutes is
(a) 45
(b) 8
(c) 360
(d) 400

Answer: C

Question. If 3 workers paint a fence in 4 days, 4 workers will take
(a) 3 days
(b) 4 days
(c) 5 days
(d) 1 day

Answer: A

Question. If 5 parts is 10 litres, then 1 part value is
(a) 1 litre
(b) 2 litres
(c) 3 litres
(d) 5 litres

Answer: B

Question. A triangle has angles. The total sum of these angles is
(a) 90 degrees
(b) 180 degrees
(c) 360 degrees
(d) 100 degrees

Answer: B

Question. Total parts in 6 : 5 : 4 : 3 : 2 is
(a) 10
(b) 15
(c) 20
(d) 25

Answer: C

Question. Purple paint ratio is Red 2 : Blue 3 : White 5. Total parts are
(a) 5
(b) 8
(c) 10
(d) 15

Answer: C

Question. For 110 units concrete (ratio 1 : 1.5 : 3), we repeat the mix how many times?
(a) 10 times
(b) 20 times
(c) 30 times
(d) 50 times

Answer: B

Question. Can we make a triangle with sides in ratio 1 : 3 : 5?
(a) Yes
(b) No
(c) Maybe
(d) Only in summer

Answer: B

Question. To divide 12 in ratio 2 : 1, sum of terms is
(a) 1
(b) 2
(c) 3
(d) 12

Answer: C

Question. To get 110 units concrete in ratio 1 : 1.5 : 3, we multiply each term by
(a) 10
(b) 20
(c) 30
(d) 5

Answer: B

Question. To simplify ratio 12 : 10 : 8 : 6 : 4, we divide by HCF which is
(a) 1
(b) 2
(c) 3
(d) 4

Answer: B

Question. Rule of three is used for
(a) Addition
(b) Subtraction
(c) Direct proportions
(d) Drawing

Answer: C

Question. When number of workers is halved, number of days is
(a) Halved
(b) Doubled
(c) Same
(d) Tripled

Answer: B

Question. If school has 9 periods in the same total time, each period is
(a) 45 minutes
(b) 40 minutes
(c) 50 minutes
(d) 30 minutes

Answer: B

Question. Purple paint 50 ml needed. Ratio 2 : 3 : 5. Blue paint ml is
(a) 10 ml
(b) 15 ml
(c) 25 ml
(d) 50 ml

Answer: B

Question. If speed increases, time to reach destination will
(a) Increase
(b) Decrease
(c) Stay same
(d) Double

Answer: B