Quiz Level: Grade 8Total Questions: 30 1 / 30 800 m³ of water is to be used to irrigate a rectangular field whose base area 160 m². What will be the height of the water level in the field? 10 m 0.5 m 5 m 1.2 m 2 / 30 In ΔABC, ∠A = 3∠B = 6∠C. Find each angle. (Write the answer in degrees) 24°, 72°, 84° 18°, 54°, 108° 30°, 60°, 90° 20°, 60°, 100° 3 / 30 Factorise: 3a²b³ - 27a³b 3a²b²(b² - 9a) 3a²b²(b - 9a²) 3a²b(b² - 9a) 3a²b²(b - 9a) 4 / 30 Find the multiplicative inverse of -1/5? Check 5 / 30 Find the product of (4p² + 5p + 7) × 3p. 12p² + 15p + 21 7p³ + 8p² + 10p 12p³ + 15p² + 21p 7p² + 8p + 10 6 / 30 What will be the perimeter of a regular pentagon of the side 3cm? 18 cm 9 cm 15 cm 12 cm 7 / 30 The population of a place increased to 60,500 in 2003 at a rate of 10% per annum. What would be the population in 2005? 72,600 72,405 73,205 73,500 8 / 30 7, 9, 11, 17, 11, 19, 21, 9, x– 4.Find the 'x' value if the mode of the above data is 11. x = 11 x = 12 x = 7 x = 15 9 / 30 Simplify: √504 3√54 6√28 6√14 3√28 10 / 30 Simplify: (ab - c)² + 2abc a²b²c² a²b² - 4abc + c² a²b² + 4abc + c² a²b² + c² 11 / 30 Factorise: 9x² - 1 (3x -1)(3x +1) (3x -1)(x +1) 3(x -1)(x +1) 9(x -1)(x +1) 12 / 30 Factorise: x²/4 + 2x + 4 (x + 4)² (x + 2)²/4 (x + 4)²/4 Can't be factorised 13 / 30 If each edge of a cube is doubled, how many times will its volume increase? New Volume increases 2 times more than Old Volume New Volume increases 8 times more than Old Volume New Volume increases 16 times more than Old Volume New Volume increases 4 times more than Old Volume 14 / 30 Simplify: √500 5√10 10√5 50√10 10√50 15 / 30 Factorise: kx + my + mx + ky (x + y)(k * m) (x + m)(k + y) (x + y)(k + m) (x + k)(y + m) 16 / 30 Factorise: 16x² + 40x + 25 Can't be factorised (4x + 5)² 8(2x + 5) +5² 4x² + 5² 17 / 30 'x' varies inversely varies to 'y' when x=40 and y=600, then find 'y' when x=400. Check 18 / 30 Find two numbers such that one of them exceeds the other by 9 and their sum is 81. 27, 36 36, 47 54, 45 36, 45 19 / 30 If each edge of a cube is doubled, how many times will its surface area increase? New Surface Area increases 24 times more than Old Surface Area New Surface Area increases 4 times more than Old Surface Area New Surface Area increases 8 times more than Old Surface Area New Surface Area increases 2 times more than Old Surface Area 20 / 30 Factorise: (x4 - y4) Can't be factorised (x² + y²)(x - y)(x - y) (x² - y²)(x + y)(x - y) (x² + y²)(x + y)(x - y) 21 / 30 Find the number of digits in the square root of 4489? 2 digits 67 digits 3 digits 12 digits 22 / 30 Evaluate √10 and round the answer to two decimal places. Check 23 / 30 Of the three angles of a triangle, one is twice the smallest and another is three times the smallest. Find the smallest angle. 60° 30° 34° 90° 24 / 30 Evaluate: (25 ÷ 28) × 2-7 1/1024 512 1024 1/512 25 / 30 Ages of two friends are in the ratio 2 : 1. If the sum of their ages is 51. Then their ages are 34 yrs, 20 yrs 20 yrs, 10 yrs 30 yrs, 15 yrs 34 yrs, 17 yrs 26 / 30 Factorise: x - 8/x = -2 x = -2, -4 x = 1, 1 x = 2, -4 x = -2, 4 27 / 30 Evaluate: 3–2 9 1/3 1/9 3 28 / 30 Find the volume of a cube whose surface area is 150 m². 150 m³ 125 m³ 625 m³ 225 m³ 29 / 30 Evaluate: -(-3)³ Check 30 / 30 The population of a place increased to 60,500 in 2003 at a rate of 10% per annum. Find the population in 2001? 45,000 55,000 60,000 50,000 Please enter your name below. Name Your score is LinkedIn Facebook VKontakte 0% Restart quiz Exit Send feedback
