Chapter 11 Algebra Ex 11.5
Chapter 11 Algebra Ex 11.5 Question 2. Complete the entries in the third column of the table. S. No. Equation Value of variable Equations satisfied Yes /No (a) 10y = 80 y = 10 (b) 10y = 80 y = 8 (c) 10y = 80 y = 5 (d) 4l = 20 l = 20 (e) […]
Chapter 11 Algebra Ex 11.4
Chapter 11 Algebra Ex 11.4 Question 1. Answer the following: (a) Take Sarita’s present age to bey years. (i) What will be her age 5 years from now? (ii) What was her age 3 years back? (iii) Sarita’s grandfather is 6 times her age. What is the age of her grandfather? (iv) Grandmother is 2 […]
Chapter 11 Algebra Ex 11.3
Chapter 11 Algebra Ex 11.3 Question 1. Make up as many expressions with numbers (no variables) as you can from three numbers 5, 7 and 8. Every number should be used not more than once. Use only addition, subtractions and multiplication. Solution: Given numbers are 5, 7 and 8. Expressions are: (i) 8 + (5 […]
Chapter 11 Algebra Ex 11.2
Chapter 11 Algebra Ex 11.2 Question 1. The side of an equilateral triangle is shown by l. Express the perimeter of the equilateral triangle using l. Solution: Given that the side of an equilateral triangle = l Perimeter of the equilateral triangle = 3 x side = 3 x l = 3 l units Question […]
Chapter 11 Algebra Ex 11.1
Chapter 11 Algebra Ex 11.1 Question 1. Find the rule which gives the number of matchsticks required to make the following matchsticks patterns. Use a variable to write the rule. (a) A pattern of letter T as T (b) A pattern of letter Z as Z (c) A pattern of letter U as U (d) […]
Chapter 10 Mensuration
Chapter 10 Mensuration Very Short Answer Type Question 1. The perimeter of a square is 64 cm. Find the length of each side. Solution: Perimeter of the square = 64 cm Question 2. Length and breadth of a rectangular table-top are 36 cm and 24 cm respectively. Find its perimeter. Solution: Length of the rectangular […]
Chapter 10 Mensuration Ex 10.3
Chapter 10 Mensuration Ex 10.3 Question 1. Find the areas of the rectangles whose sides are: (a) 3 cm and 4 cm (b) 12 m and 21 m (c) 2 km and 3 km (d) 2 m and 70 cm Solution: (a) Length of the rectangle = 3 cm Breadth of the rectangle = 4 […]
Chapter 10 Mensuration Ex 10.2
Chapter 10 Mensuration Ex 10.2 Question 1. Find the areas of the following figures by counting square: Solution: (a) Number of full squares = 9 Area of 1 square = 1 sq unit ∴ Area of 9 squares = 9 x 1 sq unit = 9 sq units. So, the area of the portion covered […]
Chapter 10 Mensuration Ex 10.1
Chapter 10 Mensuration Ex 10.1 Question 1. Find the perimeter of each of the following figures: Solution: (a) Required perimeter = 4 cm + 2 cm + 1 cm + 5 cm = 12 cm (b) Required perimeter = 40 cm + 35 cm + 23 cm + 35 cm = 133 cm or 1.33 […]
Chapter 9 Data Handling
Chapter 9 Data Handling Very Short Answer Type Question 1. A die was thrown 35 times and the following numbers were obtained: 5, 1, 4, 2, 3, 2, 6, 6, 1, 4, 2, 5, 4, 5, 3, 6, 1, 5 2, 6, 2, 5, 4, 1, 3, 2, 1, 4, 1, 6, 2, 6, 3, […]