Chapter – 4: Practical Geometry
Exercise 4.1 1. Construct the following quadrilaterals. (i) Quadrilateral ABCD AB = 4.5 cm BC = 5.5 cm CD = 4 cm AD = 6 cm AC = 7 cm Solution: – The rough sketch of the…
Chapter – 5: Data Handling
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 athletics meet….
Chapter – 6: Squares and Square Roots
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 Solution:…
Chapter – 7: Cube and Roots
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 factors, 216 = (2×2×2)×(3×3×3)…
Chapter – 9: Algebraic Expressions and Identities
Exercise 9.1 Q1. Identify the terms, their coefficients for each of the following expressions. (i) 5xyz2 – 3zy (ii) 1 + x + x2(iii) 4x2y2 – 4x2y2z2 + z2 (iv) 3 – pq + qr – p (v) (x/2) + (y/2) – xy (vi) 0.3a – 0.6ab + 0.5b Solution : Sl….
Chapter – 10: Visualizing Solid Shapes
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. Solution: (a) (iii) (iv) (b) (i)…
Chapter – 11: Mensuration
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? Solution: Side of a square = 60 m (Given) And the length…
Chapter – 12: Exponents and Power
Exercise 12.1 1. Evaluate: (i) 3-2 (ii) (-4)-2 (iii) (1/2)-5 Solution: (i) 3-2 = (1/3)2 = 1/9 (ii) (-4)-2 = (1/-4)2 = 1/16 (iii) (1/2)-5 = (2/1)5 = 25 = 32 2. Simplify and express the result in power notation with positive exponent: (i) (-4)4 ÷(-4)8 (ii) (1/23)2 …
Chapter – 13: Direct and Inverse Proportions
Exercise 13.1 1.Following are the car parking charges near a railway station upto: 4 hours Rs.60 8 hours Rs.100 12 hours Rs.140 24 hours Rs.180 Check if the parking charges are in direct proportion to the parking…
Chapter – 14: Factorization
Exercise 14.1 1. Find the common factors of the given terms. (i) 12x, 36 (ii) 2y, 22xy (iii) 14 pq, 28p2q2 (iv) 2x, 3×2, 4 (v) 6 abc, 24ab2, 12a2b (vi) 16 x3, – 4×2 , 32 x…
