CBSE Class 8 Mathematics Proportional Reasoning 2 MCQs Set D

Question. If 24 pencils cost Rs 120, then 20 pencils will cost
(a) Rs 100
(b) Rs 80
(c) Rs 120
(d) Rs 20

Answer: A

Question. A car takes 2 hours at 60 km/h. To reach in less time, speed must
(a) Decrease
(b) Increase
(c) Stay same
(d) Stop

Answer: B

Question. Coins ratio is 4 : 3 : 2 : 1 for Rs 10, 5, 2, 1. Total coins are 100. One part is
(a) 5 coins
(b) 10 coins
(c) 20 coins
(d) 50 coins

Answer: B

Question. Total bags of concrete from 3 bags cement and other parts is
(a) 10 bags
(b) 16.5 bags
(c) 15 bags
(d) 9 bags

Answer: B

Question. Constant k in inverse proportion is found by
(a) x + y
(b) x multiplied by y
(c) x divided by y
(d) x minus y

Answer: B

Question. Filling more tanks with the same pump is an example of
(a) Direct proportion
(b) Inverse proportion
(c) Subtraction
(d) Map scale

Answer: A

Question. Work done by small pump in 1 hour is
(a) 1/2 unit
(b) 1/3 unit
(c) 3 units
(d) 1 unit

Answer: B

Question. RF 1 : 50 is used for
(a) World map
(b) Classroom sketch
(c) India map
(d) Moon map

Answer: B

Question. If we double every term in 8 : 4 : 2 : 1, the spice mix taste will be
(a) Spicier
(b) Different
(c) Same
(d) Bad

Answer: C

Question. If you have 3 bags of cement for the 1 : 1.5 : 3 mix, bags of gravel needed is
(a) 3
(b) 6
(c) 9
(d) 12

Answer: C

Question. In a 1 : 3 : 5 triangle, the smallest angle is
(a) 10 degrees
(b) 20 degrees
(c) 30 degrees
(d) 40 degrees

Answer: B

Question. Ratios with many terms are used when many things change by
(a) Different factors
(b) Same factor
(c) Plus 10
(d) Minus 5

Answer: B

Question. To maintain taste in 8:4:2:1 recipe, if we have 4 chillies, coriander should be
(a) 4
(b) 8
(c) 16
(d) 2

Answer: B

Question. Work done by both pumps together in 1 hour is
(a) 1 unit
(b) 5/6 unit
(c) 1/5 unit
(d) 6 units

Answer: B

Question. In a pie chart, if the angle is 120 degrees, the fraction of the whole is
(a) 1/2
(b) 1/3
(c) 1/4
(d) 1/6

Answer: B

Question. Rule of three helps to find the
(a) First quantity
(b) Unknown quantity
(c) Sum
(d) Difference

Answer: B

Question. To divide a quantity in ratio a : b, we first find
(a) a minus b
(b) a plus b
(c) a multiplied by b
(d) b divided by a

Answer: B

Question. Total number of Rs 1 coins (1 part) in that coin set is
(a) 1
(b) 10
(c) 20
(d) 40

Answer: B

Question. If car speed is 80 km/h, time taken to reach is
(a) 2 hours
(b) 1.5 hours
(c) 1 hour
(d) 2.5 hours

Answer: B

Question. Pencils and their total cost are in
(a) Direct proportion
(b) Inverse proportion
(c) No relation
(d) Reverse proportion

Answer: A