Page No: 197 Exercise 12.1 1. Evaluate: (i) 3 -2 (ii) (-4) -2 (iii) (1/2) -5 Answer (i) 3 -2 = 1/3 2 [ ∵ a -m = 1/a m ] = 1/9 (ii) (-4) -2 = 1/(-4) 2 [∵ a-m = 1/am ] = 1/16 (iii) (1/2) -5 = (2/1) 5 [...
Page No: 171 Exercise 11.1 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 side of a square = 60...
Page No: 157 Exercise 10.1 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 (a) → (iii) →...
Page No: 140 Exercise 9.1 1. Identify the terms, their coefficients for each of the following expressions: (i) 5xyz 2 - 3zy (ii) 1+x+x 2 (iii) 4x 2 y 2 - 4x 2 y 2 z 2 +z 2 (iv) 3-pq + qr - rp (v) x/2...
Page No: 114 Exercise 7.1 1. Which of the following numbers are not perfect cubes? (i) 216 Solution By resolving 216 into prime factor, 216 = 2×2×2×3×3×3 By grouping the factors in triplets of equal...
Page No: 96 Exercise 6.1 1. What will be the unit digit of the squares of the following numbers? (i) 81 (ii) 272 (iii) 799 (iv) 3853 (v) 1234 (vi) 26387 (vii) 52698 (viii) 99880 (ix) 12796 (x) 55555...
Page No: 76 Exercise 5.1 1. For which of these would you use a histogram to show the data? (a) The number of letters for different areas in a postman’s bag. (b) The height of competitors in an...
NCERT Solutions for 8th Class Maths: Chapter 1 Rational Numbers Page No: 14 Exercise 1.1 1. Using appropriate properties find. (i) -2/3 × 3/5 + 5/2 - 3/5 × 1/6 (ii) 2/5 × (-3/7) - 1/6 × 3/2 + 1/14 ×...
Page No: 60 Exercise 4.1 1. Construct the following quadrilaterals: (i) Quadrilateral LIFT LI = 4 cm, IF = 3 cm, TL = 2.5 cm, LF = 4.5 cm, IT = 4 cm (ii) Quadrilateral GOLD OL = 7.5 cm, GL = 6 cm, GD...
Page: 41 Exercise 3.1 1. Given here are some figures. Classify each of them on the basis of the following. Simple curve (b) Simple closed curve (c) Polygon (d) Convex polygon (e) Concave polygon...
Page No: 31 Exercise 2.4 1. Amina thinks of a number and subtracts 5/2 from it. She multiplies the result by 8. The result now obtained is 3 times the same number she thought of. What is the number?...
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