Chapter 4 Simple Equations Exercise 4.3
Chapter 4 Simple Equations Exercise 4.3 Question 1. Solve the following equations: Solution: (b) 3(n – 5) = 21 ⇒ (Dividing both sides by 3) ⇒ n – 5 = 7 ⇒ n = 7 + 5 (Transposing 5 to RHS) n = 12 Check: Put n = 12 in LHS 3(12 – 5) = […]
Chapter 4 Simple Equations Exercise 4.2
Chapter 4 Simple Equations Exercise 4.2 Question 1. Given first the step you will use to separate the variable and then solve the equation: (a) x – 1 = 0 (b) x + 1 = 0 (c) x – 1 = 5 (d) x + 6 = 2 (e) y – 4 = -7 (f) […]
Chapter 4 Simple Equations Exercise 4.1
Chapter 4 Simple Equations Exercise 4.1 Question 1. Complete the given column of the table: Solution: Question 2. Check whether the value given in the brackets is a solution to the given equation or not: (a) n + 5 = 19; (n = 1) (b) 7n + 5 = 19; in – -2) (c) 7n […]
Chapter 3 Data Handling
Chapter 3 Data Handling Very Short Answer Type Question 1. Find the range of the following data: 21, 16, 30, 15, 16, 18, 10, 24, 26, 20 Solution: Greatest number 30 Smallest number = 10 Range = 30 – 10 = 20 Question 2. Find the mode of the following data: 24, 26, 23, 26, […]
Chapter 3 Data Handling Exercise 3.4
Chapter 3 Data Handling Exercise 3.4 Question 1. Tell whether the following situations are certain to happen, impossible to happen, can happen but not certain. (i) You are older today than yesterday. (ii) A tossed coin will land heads up. (iii) A dice when tossed shall land up with 8 on top. (iv) The next […]
Chapter 3 Data Handling Exercise 3.3
Chapter 3 Data Handling Exercise 3.3 Question 1. Use the bar graph to answer the following questions. (a) Which is the most popular pet? (b) How many students have dog as a pet? Solution: From the given bar graph in figure, we have (a) Cats are the most popular pet among the students. (b) 8 […]
Chapter 3 Data Handling Exercise 3.2
Chapter 3 Data Handling Exercise 3.2 Question 2. The runs scored in a cricket match by 11 players is as follows: 6, 15, 120, 50, 100, 80, 10, 15, 8, 10, 15 Find the mean, mode and median of this data. Are the three same? Solution: Given data: 6, 15, 120, 50, 100, 80, 10, […]
Chapter 3 Data Handling Exercise 3.1
Chapter 3 Data Handling Exercise 3.1 Question 1. Find the range of heights of any ten students of your class. Solution: Let us have the heights of 10 students are as follows: 140 cm, 141.5 cm, 138 cm, 150 cm, 161 cm, 138 cm, 140.5 cm, 135.5 cm, 160 cm, 158 cm Here, minimum height […]
Chapter 2 Fractions and Decimals
Chapter 2 Fractions and Decimals Very Short Answer Type Question 3. Solve the following: Solution: Question 4. Multiply 2.05 and 1.3. Solution: Questions Short Answer Type Question 6. Arrange the following in ascending order: Solution: Question 7. Find the products: (i) 2.4 × 100 (ii) 0.24 × 1000 (iii) 0.024 × 10000 Solution: Question 10. […]
Chapter 2 Fractions and Decimals Exercise 2.7
Chapter 2 Fractions and Decimals Exercise 2.7 Question 1. Find: (i) 0.4 ÷ 2 (ii) 0.35 ÷ 5 (iii) 2.48 ÷ 4 (iv) 65.4 ÷ 6 (v) 651.2 ÷ 4 (vi) 14.49 ÷ 7 (vii) 3.96 ÷ 4 (viii) 0.80 ÷ 5 Solution: Question 2. Find: (i) 4.8 ÷ 10 (ii) 52.5 ÷ 10 (iii) […]