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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Proportion
Question
1
1.
Find the mean proportional of
1
and
16
4
3
5
1
6
Question
2
2.
Dividendo
of
2
:
8
::
10
:
40
6
:
8
::
30
:
40
10
:
8
::
50
:
40
2
:
10
::
8
:
40
8
:
2
::
40
:
10
10
:
6
::
50
:
30
Question
3
3.
Find the mean proportional between
1.9
and
17.1
3.7
4.7
5.7
6.7
7.7
Question
4
4.
If
(
16
x
+
2
)
is the geometric mean of
(
3
x
+
1
)
and
(
83
x
+
1
)
,
find
x
(
1
7
,
3
)
(
5
,
15
7
)
(
3
7
,
3
)
(
1
7
,
2
)
(
1
9
,
4
)
Question
5
5.
If
5
,
x
,
20
are in continued proportion, find
x
7
9
11
13
10
Question
6
6.
If
a
:
b
::
b
:
c
,
then the mean proportional is
b
bc
ac
c
a
Question
7
7.
What
least number must be added to
3
,
6
,
7
,
12
so that the resulting numbers
are in proportion ?
5
1
2
4
3
Question
8
8.
Alternendo
of
t
:
b
::
d
:
o
b
:
t
::
o
:
d
t
:
d
::
b
:
o
t
+
b
:
b
::
d
+
o
:
o
t
+
b
:
t
−
b
::
d
+
o
:
d
−
o
t
−
b
:
b
::
d
−
o
:
o
Question
9
9.
Dividendo
of
g
d
=
y
x
d
g
=
x
y
g
y
=
d
x
g
+
d
g
−
d
=
y
+
x
y
−
x
g
+
d
d
=
y
+
x
x
g
−
d
d
=
y
−
x
x
Question
10
10.
Invertendo
of
d
s
=
p
t
d
p
=
s
t
s
d
=
t
p
d
+
s
s
=
p
+
t
t
d
−
s
s
=
p
−
t
t
d
+
s
d
−
s
=
p
+
t
p
−
t
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