Free PDF Download of CBSE Maths Multiple Choice Questions for Class8 with Answers Chapter 2 Linear Equations in One Variable. Maths MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 8 Maths Linear Equations in One Variable MCQs Pdf with Answers to know their preparation level.

## Linear Equations in One Variable Class 8 Maths MCQs Pdf

**1. Which of the following is not a linear equation in one variable?**

a) 33

b) 33(x+y)

c) 33x

d) 33y

**Answer/Explanation**

Answer: (b)

Explanation: In 33(x+y), x and y are two variables.

**2. The solution of 2x-3=7 is:**

a) 5

b) 7

c) 12

d) 11

**Answer/Explanation**

Answer: (a)

Explanation: 2x-3=7

2x=7+3=10

x=10/2 = 5

**3. The solution of 2y + 9 = 4 is:**

a) 9/2

b) 4/9

c) -⅖

d) -5/2

**Answer/Explanation**

Answer: (d)

Explanation: 2y+9 = 4

2y = 4-9 = -5

y=-5/2

**4. The solution of y/5 = 10 is:**

a) 15

b) 10

c) 50

d) 5

**Answer/Explanation**

Answer: (c)

Explanation: y/5 = 10

y = 5×10 = 50

**5. What should be added to -7/3 to get 3/7?**

a) 21/58

b) 58/21

c) 47/21

d) 50/21

**Answer/Explanation**

Answer: (b)

Explanation: Let the number be x

-7/3+x = 3/7

x=3/7+7/3 = (9+49)/21 = 58/21

**6. The perimeter of rectangle is 20cm. If the length of rectangle is 6cm, then its breadth will be:**

a) 4 cm

b) 6 cm

c) 10 cm

d) 14 cm

**Answer/Explanation**

Answer: (a)

Explanation: Perimeter of rectangle = 2(Length+Breadth)

20 = 2(6+x)

6+x = 20/2

6+x = 10

x = 10-6

x=4 cm

**7. The age of father is three times the age of son. If the age of son is 15 years old, then the age of father is:**

a) 50 years

b) 55 years

c) 40 years

d) 45 years

**Answer/Explanation**

Answer: (d)

Explanation: Let age of the father is x

Given: x = 3 × (age of son) = 3 × (15) = 45 years

**8. The difference between two whole numbers is 66. The ratio of the two numbers is 2 : 5. The two numbers are:**

a) 60 and 6

b) 100 and 33

c) 110 and 44

d) 99 and 33

**Answer/Explanation**

Answer: (c)

Explanation: Let the two numbers be 2x and 5x since they are in the ratio of 2:5.

The difference between 5x and 2x = 66

5x – 2x = 66

3x = 66

x = 22

Hence, 2x = 2(22) = 44 and 5x = 5(22) = 110.

**9. Three consecutive integers add up to 51. The integers are:**

a) 16,17,18

b) 15,16,17

c) 17,18,19

d) 18,19,20

**Answer/Explanation**

Answer: (a)

Explanation: Let the three consecutive integers be x, x+1, x+2

x+(x+1)+(x+2) = 51

3x+3 = 51

3x = 51 – 3

x = 48/3 = 16

x+1 = 16+1=17

x+2 = x+2 = 18

**10. The solution for 3m = 5m – (8/5) is:**

a) 8/5

b) ⅘

c) 5/4

d) 4/3

**Answer/Explanation**

Answer: (b)

Explanation: 3m = 5m – (8/5)

8/5 = 5m – 3m

2m = 8/5

m = 8/10 = 4/5

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