CBSE Board Practice

CBSE Grade X - Arthimetic Progressions
Question 1
1.
    • Find the sum of the following A.P. series
    • (
      3
      x
      +
      2
      y
      )
    • ,
    • (
      4
      x
      +
      6
      y
      )
    • ,
    • (
      11
      x
      +
      10
      y
      )
    • . . .
    • to
    • 7
    • terms
  • (
    80
    x
    +
    68
    y
    )
  • (
    134
    x
    +
    84
    y
    )
  • (
    94
    x
    +
    76
    y
    )
  • (
    140
    x
    +
    80
    y
    )
  • (
    126
    x
    +
    98
    y
    )
Question 2
2.
    • Given
    • t

      n
    • =
    • 27
    • , n =
    • 9
    • ,
    • S

      n
    • =
    • 135
    • , find a
  • 6
  • 0
  • 3
  • 4
  • 2
Question 3
3.
    • The
    • t

      19
    • of an A.P. is
    • 79

      8
    • and the
    • t

      8
    • is
    • 35

      8
    • .
    • Find
    • t

      17
    • .
  • 71

    6
  • 73

    8
  • 69

    8
  • 71

    8
  • 71

    10
Question 4
4.
    • How many terms of the A.P.
    • 3

      8
      ,
      7

      8
      ,
      11

      8
      ,
      . . .
    • are needed to
    • make the sum
    • 105

      8
    • ?
  • 4
  • 7
  • 8
  • 9
  • 6
Question 5
5.
    • Insert
    • 4
    • arithmetic means between
    • 8
    • and
    • 28
    • .
  • 13
    ,
    18
    ,
    23
    ,
    28
  • 11
    ,
    14
    ,
    17
    ,
    20
  • 10
    ,
    12
    ,
    14
    ,
    16
  • 14
    ,
    20
    ,
    26
    ,
    32
  • 12
    ,
    16
    ,
    20
    ,
    24
Question 6
6.
If there are n arithmetic means between a and b, the common difference d =
  • (
    b
    a
    )

    (
    n
    +
    1
    )
  • (
    n
    1
    )

    (
    a
    +
    b
    )
  • (
    a
    b
    )

    (
    n
    +
    1
    )
  • (
    a
    +
    b
    )

    (
    n
    +
    1
    )
  • (
    b
    a
    )

    (
    n
    1
    )
Question 7
7.
    • Find the next
    • 4
    • terms of the following A.P.
    • (
      a
      4
      b
      )
      ,
      (
      7
      a
      +
      3
      b
      )
      ,
      (
      15
      a
      +
      10
      b
      )
      ,
      . . .
  • (
    14
    a
    +
    6
    b
    )
    ,
    (
    22
    a
    +
    13
    b
    )
    ,
    (
    30
    a
    +
    20
    b
    )
    ,
    (
    38
    a
    +
    27
    b
    )
  • (
    23
    a
    +
    17
    b
    )
    ,
    (
    31
    a
    +
    24
    b
    )
    ,
    (
    39
    a
    +
    31
    b
    )
    ,
    (
    47
    a
    +
    38
    b
    )
  • (
    22
    a
    +
    13
    b
    )
    ,
    (
    30
    a
    +
    20
    b
    )
    ,
    (
    38
    a
    +
    27
    b
    )
    ,
    (
    46
    a
    +
    34
    b
    )
  • (
    31
    a
    +
    24
    b
    )
    ,
    (
    39
    a
    +
    31
    b
    )
    ,
    (
    47
    a
    +
    38
    b
    )
    ,
    (
    55
    a
    +
    45
    b
    )
  • (
    24
    a
    +
    21
    b
    )
    ,
    (
    32
    a
    +
    28
    b
    )
    ,
    (
    40
    a
    +
    35
    b
    )
    ,
    (
    48
    a
    +
    42
    b
    )
Question 8
8.
    • Insert
    • 3
    • arithmetic means between
    • 1

      5
    • and
    • 7

      10
    • .
  • 11

    30
    ,
    8

    15
    ,
    7

    10
  • 23

    40
    ,
    19

    20
    ,
    53

    40
  • 3

    10
    ,
    2

    5
    ,
    1

    2
  • 13

    40
    ,
    9

    20
    ,
    23

    40
  • 3

    40
    ,
    (
    -1

    20
    )
    ,
    (
    -7

    40
    )
Question 9
9.
    • Given
    • t

      n
    • =
    • 141
    • , n =
    • 18
    • ,
    • S

      n
    • =
    • 1314
    • , find d
  • 7
  • 9
  • 8
  • 10
  • 5
Question 10
10.
    • Find
    • S

      10
    • of the A.P.
    • 2
      ,
      8
      ,
      14
      ,
      . . .
    • =
  • 289
  • 288
  • 292
  • 290
  • 291