Class 8 Maths Chapter 5 Ex 5.2 Question 1. Find the square of the following numbers. (i) 32 (ii) 35 (iii) 86 (iv) 93f (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 Ex 5.3 Question 1. What could be the possible ‘one’s’ digits of the square root of each of the following numbers? (i) 9801 (ii) 99856 (iii) 998001 (iv) 657666025 Solution: Class 8 Maths Chapter Ex 5.3 (i) One’s digit in the square root of 9801 maybe 1 or 9. (ii) One’s
Ncert Class 8 Math Chapter 5 Exercise 5.4 Question 1. Find the square root of each of the following numbers by Division method. (i) 2304 (ii) 4489 (iii) 3481 (iv) 529 (v) 3249 (vi) 1369 (vii) 5776 (viii) 7921 (ix) 576 (x) 1024 (xi) 3136 (xii) 900 Solution: Ncert Class 8 Math Chapter 5 Exercise
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 =
