Cubes And Cube Roots Exercise 6.1 1). Which of the following are not perfect cubes? (i) 216 (ii) 128 (iii) 1000 (iv) 100 (v) 46656 Solution: (i) 216 216 = 2 X 2 X 2 X 3 X 3 X 3 216 = 2 X 2 X 2 X 3 X […]
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Squares And Square Roots Exercise 5.4 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: (i) 2304 √2304
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Squares And Square Roots Exercise 5.1 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) 26387 (vii) 52698 (viii) 99880 (ix) 12796 (x) 55555 Solution: (i) 81 The
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Understanding Quadrilaterals Exercise 3.3 1). Given a parallelogram ABCD. Complete each statement along with the definition or property used. (i) AD = …… (ii) Ð DCB = …… (iii) OC = …… (iv) m Ð DAB + m Ð CDA = …… Answer: (i) AD = BC The opposite sides of a parallelogram are congruent. (ii)
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Understanding Quadrilaterals Exercise 3.2 1). Find x in the following figures. (a) (b) Solution: (a) 1250 + 1250 + x0 = 3600 the sum of the measures of the external angles of any polygon is 360°. 2500 + x0 = 3600 x0 = 3600 – 2500 x0 = 1100 (b) 600 + 900 +
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Understanding Quadrilaterals Exercise 3.1 1). Given here are some figures. Classify each of them on the basis of the following. (a) Simple curve (b) Simple closed curve (c) Polygon (d) Convex polygon (e) Concave polygon Answer: (a) Simple curve Ans: Fig 1, 2, 5, 6, 7
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Linear Equations in One Variable Exercise: 2.1 Solve the following linear equations. 1). 2). 3). 4). 5). 6). Simplify and solve the following linear equations. 7). 3(t – 3) = 5(2t + 1) 8). 15(y – 4) –2(y – 9) + 5(y + 6) = 0 9). 3(5z – 7) – 2(9z – 11)
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Linear Equations in One Variable Exercise: 2.1 Solve the following equations and check your results. 1). 3x = 2x + 18 3x – 2x = 18 transposing 2x to LHS x = 18 2). 5t – 3 = 3t – 5 5t – 3t = – 5 + 3 2t
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