Ncert solutions

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1. NCERT Solutions - Mathematics , Class 8

CHAPTERS

1. Rational Numbers

2. Linear Equations in One Variable

3. Understanding Quadrilaterals

4. Data Handling

5. Squares and Square Roots

6. Cubes and Cube Roots

7. Comparing Quantities

8. Algebraic Expressions and Identities

9. Visualising Solid Shapes

10. Mensuration

11. Exponents and Powers

12. Direct and Inverse Proportions

13. Factorisation

14. Introduction to Graphs

15. Playing with Numbers

EXERCISES

1. Exercise 2.1

2. Exercise 2.2

3. Exercise 2.3

4. Exercise 2.4

5. Exercise 2.5

6. Exercise 2.6

Q1) If you subtract \frac{1}{2} from a number and multiply the result by \frac{1}{2}, you get \frac{1}{8}. What is the number?

Q2) The perimeter of a rectangular swimming pool is 154 m. Its length is 2 m more than twice its breadth. What are the length and breadth?

Q3) The base of an isosceles triangle is \frac{4}{3} cm. The perimeter of the triangle is 4\ \frac{2}{15} cm. What is the length of either of the remaining equal sides?

Q4) Sum of two numbers is 95. If one exceeds the other by 15, find the numbers.

Q5) Two numbers are in the ratio 5:3. I they differ by 18, what are the numbers?

Q6) Three consecutive integers add up to 51. What are these integers?

Q7) The sum of three consecutive multiples of 8 is 888. Find multiples.

Q8) Three consecutive integers are such that when they are taken in increasing order and multiplied by 2, 3 and 4 respectively, they add up to 74. Find these numbers.

Q9) The ages of Rahul and Haroon are in the ratio 5:7. Four years later the sum of their ages will be 56 years. What are their present ages?

Q10) The number of boys and girls in a class are in the ratio 7 : 5. The number of boys is 8 more than the number of girls. What is the total class strength?

Q11) Baichung’s father is 26 years younger than Baichung’s grandfather and 29 years older than Baichung. The sum of the ages of all the three is 135 years. What is the age of each one of them?

Q12) Fifteen years from now Ravi’s age will be four times his present age. What is Ravi’s present age?

Q13) A rational number is such that when you multiply it by \frac{5}{2} and add \frac{2}{3} to the product, you get -\frac{7}{12}. What is the number?

Q14) Lakshmi is a cashier in a bank. She has currency notes of denominations 100, 50 and 10 respectively. The ratio of the number of these notes is 2 : 3: 5. The total cash with Lakshmi is 4,00,000. How many notes of each denomination does she have?

Q15) I have a total of 300 in coins of denomination 1, 2 and 5. The number of 2 coins is 3 times the number of 5 coins. The total number of coins is 160. How many coins of each denomination are with me?

Q16) The organizers of an essay competition decide that a winner in the competition gets a prize of 100 and a participant who does not win, gets a prize of 25. The total prize money distributed is 3,000. Find the number of participants is 63.

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NCERT Solutions - Mathematics , Class 8

Rational Numbers

Linear Equations in One Variable

Understanding Quadrilaterals

Data Handling

Squares and Square Roots

Cubes and Cube Roots

Comparing Quantities

Algebraic Expressions and Identities

Visualising Solid Shapes

Mensuration

Exponents and Powers

Direct and Inverse Proportions

Factorisation

Introduction to Graphs

Playing with Numbers

Exercise 2.1

Exercise 2.2

Exercise 2.3

Exercise 2.4

Exercise 2.5

Exercise 2.6

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