Math: Middle School: Grades 6, 7 and 8 Quiz - Numbers - Roots (Answers)
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In the study of Math, a number multiplied by itself creates its own square. The original number is called the square root of the new number. Finding square and cube roots are useful calculations with the same priority as Index in the BIDMAS order.
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The square root of 125 is 11.18 to two decimal places.
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202 = 400; 212 = 441; √425 = 20.61552813.......
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Since 162 = 256, 163 must be bigger and 263 or 363 will be bigger still, so 6 is the only sensible answer
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√169 = 13
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∛1,000 = 10
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To find the square root of a power number you divide the index by 2. √(54) = 52
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The square root of a product is the product of the square roots.√64 x √144 = 8 x 12
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To find the cube root of a power number you divide the index by 3. ∛(79) = 73
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9 x 16 = 144; √ 144 = 12
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∛729 = 9 so each square face has an area of 81 cm2. A cube has six square faces; 6 x 81 = 486
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