CBSE Class 8 Mathematics Proportional Reasoning 2 MCQs Set 07

Question. Time taken by 4 pumps to fill the tank will be
(a) 36 hours
(b) 18 hours
(c) 9 hours
(d) 4 hours

Answer: C

Question. Representative Fraction (RF) usually has 1 on the left and a
(a) Small number on right
(b) Very large number on right
(c) Zero on right
(d) Fraction on right

Answer: B

Question. Speed 15 km/h takes 6 hours. Constant k (distance) is
(a) 15
(b) 6
(c) 90
(d) 21

Answer: C

Question. If speed is doubled, travel time becomes
(a) Double
(b) Half
(c) Same
(d) Zero

Answer: B

Question. If idli batter needs 2 cups rice and 1 cup dal, then for 10 cups rice, dal needed is
(a) 1 cup
(b) 2 cups
(c) 5 cups
(d) 10 cups

Answer: C

Question. Relation for inverse proportion is
(a) x + y = k
(b) x - y = k
(c) xy = k
(d) x / y = k

Answer: C

Question. In Viswanath's mix, coriander is 8 spoons and chilli is 4. This means coriander is
(a) Double
(b) Half
(c) Triple
(d) Same

Answer: A

Question. 12 divided by 3 gives a quotient of
(a) 2
(b) 3
(c) 4
(d) 6

Answer: C

Question. In cricket session, time for batting is 4 parts. So minutes spent is
(a) 30
(b) 40
(c) 50
(d) 60

Answer: B

Question. Total students in grade table is 12+10+8+6+4. Total is
(a) 30
(b) 40
(c) 50
(d) 360

Answer: B

Question. To check if two ratios are proportional, we use this method
(a) Addition
(b) Subtraction
(c) Cross-multiplication
(d) Division

Answer: C

Question. If 5 workers move 4500 bricks, 20 workers move
(a) 4500 bricks
(b) 9000 bricks
(c) 18000 bricks
(d) 1000 bricks

Answer: C

Question. In the ratio a : b : c : d, if we divide a by p, then we must divide b by
(a) q
(b) p
(c) r
(d) s

Answer: B

Question. For very strong pillars and roofs, concrete ratio is
(a) 1 : 1 : 1
(b) 1 : 2 : 3
(c) 1 : 1.5 : 3
(d) 3 : 2 : 1

Answer: C

Question. Number of families and days water lasts are in
(a) Direct proportion
(b) Inverse proportion
(c) Same proportion
(d) Addition

Answer: B

Question. 6 hours are needed to fill 2 tanks. To fill 5 tanks, time is
(a) 6 hours
(b) 15 hours
(c) 10 hours
(d) 12 hours

Answer: B

Question. In 110 units concrete, the sand amount is
(a) 20 units
(b) 30 units
(c) 60 units
(d) 10 units

Answer: B

Question. 20 workers take 4 days. If workers become 10, days will
(a) Decrease
(b) Stay same
(c) Double
(d) Triple

Answer: C

Question. Angle for Grade E (2 parts out of 20) will be
(a) 18 degrees
(b) 36 degrees
(c) 54 degrees
(d) 72 degrees

Answer: B

Question. Ratio 8 : 4 : 2 : 1. If we make everything double, first term is
(a) 8
(b) 16
(c) 4
(d) 2

Answer: B