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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Proportion
Question
1
1.
Which of the following represents a proportion ?
33
:
49
::
66
:
147
34
:
50
::
102
:
100
31
:
47
::
93
:
188
32
:
48
::
160
:
240
30
:
46
::
120
:
138
Question
2
2.
If
a
:
b
::
c
:
d
,
then
abc = bcd
ad = bc
ac = bd
ab = cd
Question
3
3.
Componendo and Dividendo
of
8
:
9
::
56
:
63
1
:
9
::
7
:
63
17
:
9
::
119
:
63
9
:
8
::
63
:
56
17
:
1
::
119
:
7
8
:
56
::
9
:
63
Question
4
4.
Componendo and Dividendo
of
6
8
=
24
32
8
6
=
32
24
2
8
=
8
32
14
2
=
56
8
14
8
=
56
32
6
24
=
8
32
Question
5
5.
Find the third proportional of 4 and 8
19
14
17
16
15
Question
6
6.
Solve
√
(
x
−
3
)
+
√
(
x
+
2
)
√
(
x
−
3
)
−
√
(
x
+
2
)
=
9
3
-3
(
-17
5
)
(
-11
3
)
(
-13
3
)
-5
Question
7
7.
If
(
3
x
2
−
13
x
y
+
12
y
2
)
=
0
, find
x : y
4 : 1
or
4 : 3
3 : 1
or
4 : 5
3 : 1
or
4 : 3
3 : 1
or
3 : 3
2 : 1
or
4 : 3
Question
8
8.
If
(
a
3
+
12
a
)
(
6
a
2
+
8
)
=
28
26
, find
a
5
6
1
3
4
Question
9
9.
If
a
b
+
c
=
b
c
+
a
=
c
a
+
b
where
a
+
b
+
c
≠
0,
then each of the ratios is equal to
a + b + c
-1
2
1
2
(
-1
2
)
Question
10
10.
Invertendo
of
6
:
9
::
42
:
63
15
:
9
::
105
:
63
9
:
6
::
63
:
42
3
:
9
::
21
:
63
6
:
42
::
9
:
63
15
:
3
::
105
:
21
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