CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade VIII - Rational Numbers
Question 1
1.
Which of the following are true?
a)
real numbers are closed under addition
b)
real numbers are closed under division
c)
real numbers are closed under multiplication
d)
real numbers are closed under subtraction
  • {b,d}
  • {b,c}
  • {b,a,c}
  • {b,a}
  • {a,c,d}
Question 2
2.
Find the difference of the rational numbers at the points labelled with letters Q and R
  • -1
  • (
    -3
    2
    		 )
  • (
    -1
    4
    		 )
  • (
    -1
    2
    		 )
  • 1
    2
Question 3
3.
    • Which of the following decimal numbers lie between
    • 227.5028
    • and
    • 227.5029
    • ?
  • 2275.0285
  • 227.50293
  • 227.50275
  • 22.75029
  • 227.50285
Question 4
4.
Find the equation representing the following number line diagram
  • 5
    9
    +
    5
    9
    =
    10
    9
  • 1
    3
    +
    1
    3
    =
    2
    3
  • 4
    9
    −
    2
    3
    =
    (
    -2
    9
    		 )
  • 2
    3
    −
    1
    3
    =
    1
    3
  • 4
    9
    −
    1
    3
    =
    1
    9
Question 5
5.
Which of the following is true?
  • 27
    19
    >
    17
    9
  • 37
    26
    <
    29
    28
  • 39
    28
    <
    27
    22
  • 27
    10
    <
    14
    11
  • 28
    11
    <
    24
    7
Question 6
6.
Find the sum of the decimal numbers at the points labelled with letters M and N
  • 19.8
  • 19.9
  • 19.3
  • 19.2
  • 19.5
Question 7
7.
    • Which of the following is true?
a)
3.9500
✕
(
 17.2300
✕
 5.6700
)
=
(
 3.9500
✕
 17.2300
)
✕
 5.6700
b)
15.6200
÷
(
 3.9500
÷
 17.2300
)
=
(
 15.6200
÷
 3.9500
)
÷
 17.2300
c)
5.6700
−
(
 15.6200
−
 3.9500
)
=
(
 5.6700
−
 15.6200
)
−
 3.9500
d)
17.2300
+
(
 5.6700
+
 15.6200
)
=
(
 17.2300
+
 5.6700
)
+
 15.6200
  • {b,a}
  • {c,d}
  • {b,c,a}
  • {b,d,a}
  • {a,d}
Question 8
8.
Which of the following are true?
a)
15
4
+
28
9
=
28
9
+
15
4
b)
20
13
÷
15
11
=
15
11
÷
20
13
c)
20
13
−
28
9
=
28
9
−
20
13
d)
15
4
✕
15
11
=
15
11
✕
15
4
  • {c,d}
  • {b,a}
  • {a,d}
  • {b,c,a}
  • {b,d,a}
Question 9
9.
    • 12
    • −
    • 13
      2
    • = ______
  • 11
    4
  • 13
    2
  • 11
    2
  • 11
  • 9
    2
Question 10
10.
The decimal number -4.0093 lies between
  • {-4.0095,-4.0094}
  • {-4.0103,-4.0083}
  • {-4.0083,-4.0073}
  • {-4.0092,-4.0091}
  • {-4.0113,-4.0103}