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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Proportion
Question
1
1.
Solve
√
(
x
−
1
)
+
√
(
x
+
2
)
√
(
x
−
1
)
−
√
(
x
+
2
)
=
8
5
(
-69
32
)
(
-349
160
)
(
-347
160
)
(
-343
158
)
(
-13
6
)
Question
2
2.
If
(
6
x
+
16
)
,
(
x
+
14
)
,
(
4
x
+
8
)
and
(
x
+
2
)
are in proportion,
find
x
(
21
,
-1
)
(
20
,
-3
)
(
20
,
-2
)
(
22
,
-2
)
(
0
,
22
)
Question
3
3.
If
(
8
x
2
−
14
x
y
+
5
y
2
)
=
0
, find
x : y
5 : 4
or
0 : 2
4 : 4
or
1 : 2
6 : 4
or
1 : 2
5 : 4
or
1 : 2
5 : 4
or
1 : 5
Question
4
4.
Which of the ratios is proportional to 12 : 2?
18
:
6
17
:
3
19
:
3
18
:
1
18
:
3
Question
5
5.
Componendo and Dividendo
of
a
:
i
::
q
:
n
i
:
a
::
n
:
q
a
+
i
:
a
−
i
::
q
+
n
:
q
−
n
a
+
i
:
i
::
q
+
n
:
n
a
:
q
::
i
:
n
a
−
i
:
i
::
q
−
n
:
n
Question
6
6.
If
(
a
3
+
3
a
)
(
3
a
2
+
1
)
=
730
728
, find
a
5
4
3
4
7
4
5
6
5
2
Question
7
7.
Find the third proportional of 1 and 6
34
39
37
36
35
Question
8
8.
If
a
b
+
c
=
b
c
+
a
=
c
a
+
b
where
a
+
b
+
c
=
0,
then each of the ratios is equal to
-1
2
(
-1
2
)
1
2
a + b + c
Question
9
9.
What
least number must be added to
18
,
8
,
23
,
11
so that the resulting numbers
are in proportion ?
4
7
8
6
9
Question
10
10.
Find the mean proportional between
5.6
and
50.4
16.8
14.8
18.8
15.8
17.8
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