Algebra Book Back Questions

8th Standard EM

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Maths

Time : 00:45:00 Hrs
Total Marks : 30
    4 x 1 = 4
  1. The product of 7p3 and (2p2)2 is

    (a)

    14p12

    (b)

    28B7

    (c)

    9p7

    (d)

    11p12

  2. The missing terms in the product -3m3n X9(_)m4n3 are

    (a)

    mn2,27

    (b)

    m2n,27

    (c)

    m2n2,-27

    (d)

    mn2,-27

  3. If the area of a square is 36x4y2then, its side is______

    (a)

    6x4y2

    (b)

    8x2y2

    (c)

    6x2y2

    (d)

    -6x2y

  4. If the area of a rectangular land is(a2-b2)− sq.units whose breadth is()ab− then, its length is__________

    (a)

    a-b

    (b)

    a+b

    (c)

    a2-b

    (d)

    (a+b)2

  5. 4 x 1 = 4
  6. \(\cfrac { { I }^{ 4 }{ m }^{ 5 }{ n }^{ (\_) } }{ 2lm^{ (3) }{ n }^{ 6 } } =\cfrac { { l }^{ 3 }{ m }^{ 2 }n }{ 2 } \)

    ()

    \(\cfrac { { I }^{ 4 }{ m }^{ 5 }{ n }^{ (7) } }{ 2lm^{ (3) }{ n }^{ 6 } } =\cfrac { { l }^{ 3 }{ m }^{ 2 }n }{ 2 } \)

  7. \(\cfrac { { 42a }^{ 4 }{ b }^{ 5 }\left( \_ \right) }{ { 6a }^{ 4 }{ b }^{ 2 } } =\left( \_ \right) { b }^{ 3 }{ c }^{ 2 }\)

    ()

     \(\cfrac { { 42a }^{ 4 }{ b }^{ 5 }\left( c^2 \right) }{ { 6a }^{ 4 }{ b }^{ 2 } } =\left( 7 \right) { b }^{ 3 }{ c }^{ 2 }\)

  8. Expand the following
    (3 - a)2=________

    ()

    (3 - a)2 =32-2(3) (a) +a2= 9 - 6a + a2

  9. Expand the following
    (62-x2)=_______

    ()

    (62-x2) = (6+x)(6-x)

  10. 2 x 1 = 2
  11. 8x3y÷4x2=2xy

    (a) True
    (b) False
  12. 7ab3÷14ab=2b2

    (a) True
    (b) False
  13. 3 x 2 = 6
  14. Multiply a monomial by a monomial
    6x,4

  15. Find the product of the terms
    3x2y, −3xy3 ,x2y2

  16. Find the product of (m2-n)(5m2n2-n2)

  17. 3 x 3 = 9
  18. Multiply (3xy +7) by ( −4y )

  19. Expand y2-16 using a2−b2 identity

  20. Expand: (x+3)(x+5)(x+2)

  21. 1 x 5 = 5
  22. Factorise:(2x+5)(x-y)+(4y)(x-y)

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