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Class 8 Exam  >  Class 8 Tests  >  Mental Mathematics for Class 8  >  Test: Linear Equations in One Variable- 2 - Class 8 MCQ

Test: Linear Equations in One Variable- 2 - Class 8 MCQ


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15 Questions MCQ Test Mental Mathematics for Class 8 - Test: Linear Equations in One Variable- 2

Test: Linear Equations in One Variable- 2 for Class 8 2024 is part of Mental Mathematics for Class 8 preparation. The Test: Linear Equations in One Variable- 2 questions and answers have been prepared according to the Class 8 exam syllabus.The Test: Linear Equations in One Variable- 2 MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Linear Equations in One Variable- 2 below.
Solutions of Test: Linear Equations in One Variable- 2 questions in English are available as part of our Mental Mathematics for Class 8 for Class 8 & Test: Linear Equations in One Variable- 2 solutions in Hindi for Mental Mathematics for Class 8 course. Download more important topics, notes, lectures and mock test series for Class 8 Exam by signing up for free. Attempt Test: Linear Equations in One Variable- 2 | 15 questions in 30 minutes | Mock test for Class 8 preparation | Free important questions MCQ to study Mental Mathematics for Class 8 for Class 8 Exam | Download free PDF with solutions
Test: Linear Equations in One Variable- 2 - Question 1
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Sum of ages of 5 friends is n years. What is the sum of their ages after 3 years?

Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 1

(n + 15 ) years

Test: Linear Equations in One Variable- 2 - Question 2
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Form an expression: when twice a number x is added to thrice its reciprocal.

Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 2

2x + 3/x

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Test: Linear Equations in One Variable- 2 - Question 3
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Give a number which is always even in terms of variable x.

Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 3

Correct option is B. 

Test: Linear Equations in One Variable- 2 - Question 4
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Form an equation for a multiple of 5 added to 19 is 54.
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 4

5x + 19 = 54

Test: Linear Equations in One Variable- 2 - Question 5
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48 sweets are to be distributed among three friends A, B and C in such a way that. B gets 5 sweets more than A and C gets 7 sweets more than A. Form an equation.
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 5

3x + 12 = 48

Test: Linear Equations in One Variable- 2 - Question 6
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Find x if 2x + 5 = x + 25.
Test: Linear Equations in One Variable- 2 - Question 7
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If x = n + 1 then find the value o f (2x + 5) 
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 7

2n + 7

Test: Linear Equations in One Variable- 2 - Question 8
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Ratio of three angles of a triangle is 1 : 2 : 3. Find the angles.
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 8

30°, 60°, 90°

Test: Linear Equations in One Variable- 2 - Question 9
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Preeti has three more dolls than Renu. If there are 11 dolls in all, how many dolls does each have?
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 9

Let's solve the problem step by step.

Step 1: Define the variables

  • Let the number of dolls Renu has be x.
  • Since Preeti has three more dolls than Renu, Preeti has x+3 dolls.

Step 2: Set up the equation

The total number of dolls is 11. So:

x+(x+3)=11

Step 3: Solve the equation

Combine like terms:

2x+3=11

Subtract 3 from both sides:

2x=8

Divide by 2:

x=4

So, Renu has 4 dolls.

Step 4: Find the number of dolls Preeti has

Preeti has x+3 dolls:

4+3=7

Conclusion:

Renu has 4 dolls, and Preeti has 7 dolls.

Correct answer: Option 4: 7, 4

Test: Linear Equations in One Variable- 2 - Question 10
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Sum of two numbers is 30. If one number is twice the other, form an equation for finding the numbers.
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 10

2x + x = 30

Test: Linear Equations in One Variable- 2 - Question 11
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Perimeter of the top of a table in the conference hall is 32m. If the length of the table is 3 times its breadth, how long is the table?
Test: Linear Equations in One Variable- 2 - Question 12
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3(x + 4) = x + 38 find x.
Test: Linear Equations in One Variable- 2 - Question 13
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If father is twice as old as his son and also 29 years older than his son. What is the age of father?
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 13

58 years

Test: Linear Equations in One Variable- 2 - Question 14
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Two numbers are in the ratio 4:7. If the sum of numbers is 143, find the numbers.
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 14

52, 91

Test: Linear Equations in One Variable- 2 - Question 15
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Find three consecutive odd numbers whose sum is 147.
Detailed Solution for Test: Linear Equations in One Variable- 2 - Question 15

47, 49, 51

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