## Chapter 15 Statistics Set 15.2

Chapter 15 Statistics Set 15.2 Question 1. The height of 30 children in a class is given in centimeters. Draw up a frequency table of this data. 131, 135, 140,…

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Chapter 15 Statistics Set 15.2

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Chapter 15 Statistics Set 15.1

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Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.4

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Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.3

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Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.2

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Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.1

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Chapter 13 Pythagoras Theorem Set 13.2

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Chapter 13 Pythagoras Theorem Set 13.1

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Chapter 12 Perimeter and Area Set 12.4

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Chapter 12 Perimeter and Area Set 12.3

Chapter 15 Statistics Set 15.2 Question 1. The height of 30 children in a class is given in centimeters. Draw up a frequency table of this data. 131, 135, 140,…

Chapter 15 Statistics Set 15.1 Question 1. The daily rainfall for each day of a week in a certain city is given in millimeters. Find the average rainfall during the…

Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.4 Question 1. Factorize the following expressions: Solution: i. p² – q² Here, a = p, b = q ∴ p²…

Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.3 Question 1. Factorise the following expressions and write them in the product form. i. 201a³b² ii. 91xyt² iii. 24a²b² iv.…

Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.2 Question 1. Use the formula to multiply the following: i. (x + y)(x – y) ii. (3x – 5)(3x +…

Chapter 14 Algebraic Formulae – Expansion of Squares Set 14.1 Question 1. Expand: Solution: i. (5a + 6b)² Here, A = 5a and B = 6b (5a + 6b)² =…

Chapter 13 Pythagoras Theorem Set 13.2 Question 1. Find the Pythagorean triplets from among the following sets of numbers: i. 3,4,5 ii. 2,4,5 iii. 4,5,6 iv. 2,6,7 v. 9,40,41 vi.…

Chapter 13 Pythagoras Theorem Set 13.1 Question 1. In the figures below, find the value of ‘x’. Solution: i. In ∆LMN, ∠M = 90°. Hence, side LN is the hypotenuse.…

Chapter 12 Perimeter and Area Set 12.4 Question 1. Find the total surface area of cubes having the following sides: i. 3 cm ii. 5 cm iii. 7.2 m iv.…

Chapter 12 Perimeter and Area Set 12.3 Question 1. A page of a calendar is 45 cm long and 26 cm wide. What is its area? Solution: Area of page…