NCERT Solutions with NCERTplanet
NCERT Solutions with NCERTplanet
Class 8 – Mathematics Factorisation – Exercise 14.1 Question :1. Find the common factors of the given terms. (i) 12x, 36 (ii) 2y, 22xy (iii) 14pq, 28p²q² (iv) 2x, 3x², 4 (v) 6abc, 24ab², 12a²b (vi) 16x³, −4x², 32x (vii)…
Class 8 – Mathematics Direct and Inverse Proportions – Exercise 13.2 Question : 1. Which of the following are in inverse proportion: (i) The number of workers on a job and the time to complete the job. (ii) The time…
Class 8 – Mathematics Direct and Inverse Proportions – Exercise 13.1 Question : 1.Following are he car parking charges near a railway station up to: 4 hours Rs.60 8 hours Rs.100 12 hours Rs.140 24 hours Rs.180 Check if the…
Class 8 – Mathematics Exponents and Powers – Exercise 12.2 1. Express the following numbers in standard form: (i) 0.0000000000085 (ii) 0.00000000000942 (iii) 6020000000000000 (iv) 0.00000000837 (v) 31860000000 Answer : (i) 0.0000000000085 = 0.0000000000085 x 1012⁄1012 = 8.5 x 10-12…
Class 8 – Mathematics Exponents and Powers – Exercise 12.1 1. Evaluate: Answer : 2. Simplify and express the result in power notation with positive exponent: Answer : 3. Find the value of: Answer : 4. Evaluate: Answer : 5.…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 11.4 Question :1.Given a cylindrical tank, in which situation will you find surface are and in which situation volume. (a) To find how much it can hold. (b) Number of…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 11.3 Question :1. There are two cuboidal boxes as shown in the adjoining figure. Which box requires the lesser amount of material to make? Answer : (a) Given: Length of…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 11.2 Question :1.The shape of the top surface of a table is a trapezium. Find its area if its parallel sides are 1 m and 1.2 m and perpendicular distance…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 11.1 Question :1. A square and a rectangular field with measurements as given in the figure have the same perimeter. Which field has a larger area? Answer : Given: The…
Class 8 – Mathematics Visualising Solid Shapes – Exercise 10.2rm Question :1.Can a polyhedron have for its faces Answer : (i) 3 triangles? (ii) 4 triangles? (iii) a square and four triangles? A polyhedron is bounded by four or more…
Class 8 – Mathematics Visualising Solid Shapes – Exercise 10.1 Question :1.For each of the given solid, the two views are given. Match for each solid the corresponding top and front views. The first one is done for you. Answer…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 9.5 Question :1. Use a suitable identity to get each of the following products: (i) (x + 3)(x + 3) (ii) (2y + 5)(2y + 5) (iii) (2a − 7)(2a…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 9.4 Question :1. Multiply the binomials: (i) (2x + 5) and (4x – 3) (ii) (y – 8) and (3y – 4) (iii) (2.5𝓁 – 0.5m) and (2.5𝓁 + 0.5m)…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 9.3 1. Carry out the multiplication of the expressions in each of the following pairs: (i) 4p, q + r (ii) ab, a – b (iii) a + b, 7a²b²…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 9.2 Question :1. Find the product of the following pairs of monomials: (i) 4, 7p (ii) -4p, 7p (iii) -4p, 7pq (iv) 4p³, -3p (v) 4p, 0 Answer : (i)…
Class 8 – Mathematics Algebraic Expressions and Identities – Exercise 9.1 Question :1. Identify the terms, their coefficients for each of the following expressions: (i) 5xyz² – 3zy (ii) 1 + 𝓍 + 𝓍 ² (iii) 4𝓍²y² – 4𝓍²y²z² +…
Class 8 – Mathematics Comparing Quantities – Exercise 8.2 Question: 1. A man got 10% increase in his salary. If his new salary is Rs.1,54,000, find his original salary. Answer : Let original salary be Rs.100. Therefore New salary i.e.,…
Class 8 – Mathematics Comparing Quantities – Exercise 8.3 Question: 1. Calculate the amount and compound interest on: (a) Rs.10,800 for 3 years at 121⁄2% per annum compounded annually. (b) Rs.18,000 for 21⁄2 years at 10% per annum compounded annually.…
Class 8 – Mathematics Comparing Quantities – Exercise 8.1 Question: 1. Find the ratio of the following: (a) Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour. (b) 50 m to 10…
Class 8 – Mathematics Cubes and Cube Roots – Exercise 7.2 Question :1. Find the cube root of each of the following numbers by prime factorization method: (i) 64 (ii) 512 (iii) 10648 (iv) 27000 (v) 15625 (vi) 13824 (vii)…