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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Proportion
Question
1
1.
If
(
5
x
+
17
)
,
(
x
+
6
)
,
(
7
x
+
4
)
and
(
x
+
12
)
are in proportion,
find
x
(
(
-17
4
)
,
21
)
(
(
-9
2
)
,
19
)
(
(
-9
2
)
,
20
)
(
(
-7
2
)
,
20
)
(
22
,
(
-5
2
)
)
Question
2
2.
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
)
2
a + b + c
-1
Question
3
3.
Componendo
of
9
:
8
::
63
:
56
17
:
8
::
119
:
56
8
:
9
::
56
:
63
9
:
63
::
8
:
56
1
:
8
::
7
:
56
17
:
1
::
119
:
7
Question
4
4.
If
(
a
3
+
48
a
)
(
12
a
2
+
64
)
=
91
37
, find
a
29
28
27
26
30
Question
5
5.
If
'a'
≠
'b'
and
'a'
:
'b'
is the duplicate ratio of (
'a'
+
'c'
) : (
'b'
+
'c'
),
then the mean proportional between
'a'
and
'b'
is
c
2c
c
2
c
2
Question
6
6.
Dividendo of
3
5
=
42
70
8
2
=
112
28
3
42
=
5
70
8
5
=
112
70
5
3
=
70
42
2
5
=
28
70
Question
7
7.
Find the product of means of
1
:
9
and
9
:
19
81
78
19
84
80
Question
8
8.
Dividendo
of
n
r
=
a
k
n
+
r
n
−
r
=
a
+
k
a
−
k
n
a
=
r
k
r
n
=
k
a
n
+
r
r
=
a
+
k
k
n
−
r
r
=
a
−
k
k
Question
9
9.
If
a
:
b
::
b
:
c
,
then '
c
' is called
third proportional
first term
mean proportional
second term
Question
10
10.
Find the product of extremes of
4
:
15
and
10
:
8
31
150
29
32
34
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