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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Proportion
Question
1
1.
Componendo and Dividendo
of
9
6
=
63
42
6
9
=
42
63
9
63
=
6
42
15
3
=
105
21
3
6
=
21
42
15
6
=
105
42
Question
2
2.
Solve
√
(
x
−
2
)
+
√
(
x
−
1
)
√
(
x
−
2
)
−
√
(
x
−
1
)
=
7
6
167
168
55
56
167
170
169
168
167
166
Question
3
3.
Invertendo
of
9
7
=
45
35
16
2
=
80
10
9
45
=
7
35
16
7
=
80
35
7
9
=
35
45
2
7
=
10
35
Question
4
4.
If
5
,
x
,
80
are in continued proportion, find
x
20
21
18
22
19
Question
5
5.
If
15
:
12
::
x
:
24
, find '
x
'
30
31
27
32
29
Question
6
6.
Alternendo
of
6
:
2
::
18
:
6
4
:
2
::
12
:
6
6
:
18
::
2
:
6
2
:
6
::
6
:
18
8
:
2
::
24
:
6
8
:
4
::
24
:
12
Question
7
7.
If
a
b
+
c
=
b
c
+
a
=
c
a
+
b
where
a
+
b
+
c
≠
0,
then each of the ratios is equal to
-1
a + b + c
1
2
(
-1
2
)
2
Question
8
8.
Find the product of extremes of
9
:
6
and
16
:
12
108
111
107
96
106
Question
9
9.
Dividendo
of
5
6
=
25
30
11
6
=
55
30
6
5
=
30
25
5
25
=
6
30
11
1
=
55
5
1
6
=
5
30
Question
10
10.
Componendo
of
6
8
=
30
40
14
8
=
70
40
6
30
=
8
40
8
6
=
40
30
14
2
=
70
10
2
8
=
10
40
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