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Class 8 Math: Linear Equations in One Variable
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MCQs on solving equations with variables and numbers, linear equation applications, equation reduction and finding the variable value, linear equation reductions and age or money denomination currency word problems.
 

Class 8 Math: Linear Equations in One Variable
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25 Questions

1. If the perimeter of a regular hexagon is 192 m then find the Length of each side of the regular hexagon.
2. Simplify: \(\frac{2x+1}{2} + \frac{2x-1}{3}\) = 1.
3. Jon is thrice as old as Kavya. Five years ago his age was two times Kavya’s age. Find their present age.
4. What should be added to twice the rational number \(\frac{13}{3}\) to get \(\frac{13}{6}\)?
5. The notebook costs thirty rupees. How many ten rupees notes will be required to pay the whole amount?
6. Solve: 11x – 2 = 7x + 12.
7. A boy has all five rupees coins and he need to pay one hundred and thirty five rupees to a shopkeeper for his grocery. How coins does he need to pay the total amount?
8. Sara is twice the age of Marry. The sum total of Sara’s age and Marry’s age after five years is 52. What is Marry’s present age?
9. Raj buys books worth rupees four hundred, he has coins of denomination two-rupees. How many coins does he need to pay the bill?
10. Solve equation 7x + 14 = 21 to find value of x.
11. Mohan has to pay two hundred rupees for a book but has only a note of two thousands rupees, what amount will he get back?
12. If Malik has 3 coins and his sister has 4 coins each of 2 rupees, what will be the sum of amount both have?
13. Present ages of Anu and Raj are in the ratio 4:5. Eight years from now the ratio of their ages will be 5:6. Find their present ages.
14. Solve: 7x – 2 = 3.
15. Find the solution for the equation 3x + 3 = 4.
16. If Ram’s present age is 3 years and Shyam is twice Ram’s present age. What will be Shyam’s age after 10 years?
17. The sum of two natural numbers is 5, the numbers are in a ratio 2:3. Find the numbers.
18. At Tanay’s birth, he was 34 years younger than his father. What will be his age after 20 years?
19. If the perimeter of a scalene triangle is 23 cm, with side 1 with Length 12 cm and side 2 with Length 3 cm. Find the Length of third side.
20. Bansal has 7 times as many two-rupee coins as he has five-rupee coins. If he has in all a sum of rupees 95, how many coins of each denomination does he have?
21. When the equation \(\frac{12x}{2} + \frac{6x}{5}\) = 0 is simplified the solution of the equation would be?
22. Form an equation for all multiples of 12.
23. If a side of a regular hexagon is 20 cm then what will be the perimeter of that regular hexagon?
24. If a girl buys an ice cream worth twenty seven rupees and pays the shopkeeper with a note worth fifty rupees. What will be the change she received from the shopkeeper?
25. A boy has two two rupees coins, one five rupees coins and two ten rupees coins. In what combination should the boy select three coins so the amount is maximum?

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