Ncert Class 8 Chapter 5 Exercise 5.1 Question 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) 20387 (vii) 52698 (viii) 99880 (ix) 12796 (x) 55555 Solution: (i) Unit digit of 81² = 1 (ii) Unit digit of 272² […]
Class 8 Maths Chapter 6 Ex 6.2 Question 1. Find the square of the following numbers. (i) 32 (ii) 35 (iii) 86 (iv) 93 (v) 71 (vi) 46 Solution: (i) 32 = 30 + 2 (32)² = (30 + 2)² = 30(30 + 2) + 2(30 + 2) = 30² + 30 × 2 +
Class 8 Maths Chapter 6 Ex 6.2 Question 1. Find the cube root of each of the following numbers by prime factorisation method. (i) 64 (ii) 512 (iii) 10648 (iv) 27000 (v) 15625 (vi) 13824 (vii) 110592 (viii) 46656 (ix) 175616 (x) 91125 Solution: Question 2. State True or False. (i) Cube of an odd
Ncert Class 8 Chapter 6 Exercise 6.1 Ncert Class 8 Chapter 6 Exercise 6.1 Question 1. Which of the following numbers are not perfect cubes? (i) 216 (ii) 128 (iii) 1000 (iv) 100 (v) 46656 Solution: (i) Prime factorisation of 216 is: 216 = 2 × 2 × 2 × 3 × 3 × 3 In the above
Ncert Class 8 Math Chapter 7 Exercise 7.3 Question 1. The population of a place increased to 54000 in 2003 at a rate of 5% per annum (i) find the population in 2001 (ii) what would be its population in 2005? Solution: (i) It’s given that population in the year 2003 = 54,000 54,000 =
Ncert Class 8 math Chapter 7 Exercise 7.2 Question 1. During a sale, a shop offered a discount of 10% on the marked prices of all the items. What would a customer have to pay for a pair of jeans marked at ₹ 1450 and two shirts marked at ₹ 850 each? Solution:
Ncert class 8 mathChapter 7 Exercise 7.1 Question 1. Find the ratio of the following: (a) speed of a cycle 15 km per hour to the speed of scooter 30 km per hour. (b) 5 m to 10 km (c) 50 paise to ₹ 5 Solution: (a) Speed of cycle : Speed of Scooter =
Class 8 Maths Chapter 13 Ex 13.2 Question 1. Draw the graphs for the following tables of values, with suitable scales on the axes. (a) Cost of apples (b) Distance travelled by car. (i) How much distance did the car cover during the period 7:30 am to 8 am? (ii) What was the time when
Class 8 Maths Chapter 12 Exercise 12.3 Question 1. Carry out the following divisions. (i) 28×4 ÷ 56x (ii) -36y³ ÷ 9y² (iii) 66pq²r³ ÷ 11qr² (iv) 34x³y³z³ ÷ 51xy²z³ (v) 12a8b8 ÷ (-6a6b4) Solution: Question 2. Divide the following polynomial by the given monomial. (i) (5x² – 6x) ÷ 3x (ii) (3y8 – 4y6 + 5y4) ÷ y4
Class 8 Maths Chapter 13 Ex 13.1 Class 8 Maths Chapter 13 Ex 13.1 Question 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 pm? (b) When was the patient’s temperature 38.5°C? (c) The patient’s temperature was the same two
