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Chapter 11: Mensuration Ex 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? 2. Mrs Kaushik has a square plot with the measurement as shown in the figure. She wants to construct a house…
Chapter 12: Powers and Exponents Ex 12.1 1. Evaluate i) 3-2 ii) (-4)-2 iii) (1/2) ⁻⁵ 2. Simplify and express the result in power notation with a positive exponent i) (-4)5 ÷ (-4)8 ii) (1/23)2 iii) (-3)4 × (5/3)4 iv) (3-7 ÷ 3-10) × 3-5 v) 2-3 × (-7)-3 3. Find the value of i)…
Chapter 13: Direct and Inverse Proportion Ex 13.1 1. Following are the car parking charges near a railway station up to 4 hours ₹60 8 hours ₹100 2 hours ₹140 24 hours ₹180 Check if the parking charges are in direct proportion to the parking time 2. A mixture of…
Chapter 14: Factorisation Ex 14.1 1. Find the common factors of the given terms. First 6 sum link (i) 12x, 36 (ii) 2y, 22xy (iii) 14 pq, 28p² q² (iv) 2x, 3x² , 4 (v) 6 abc, 24ab², 12 a²b (vi) 16 x³, – 4x², 32x (vii) 10 pq, 20qr,…
Chapter 15: Introduction to Graphs Ex 15.1 1. The following graph shows the temperature of a patient in a hospital, recorded every hour. (a) What was the patient’s temperature at 1 p.m.? (b) When was the patient’s temperature 38.5° C? (c) The patient’s temperature was the same two times during the…
Chapter 16: Playing With Numbers Ex 16.1 Find the values of the letters in each of the following and give reasons for the steps involved. First 4 sums 5 and 6th sum 7 and 8th sum 9 and 10th sum 1. 3 A 2. 4 A …