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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade X - Proportion
Question
1
1.
If
a
b
=
c
d
,
then which of the following is true ?
4
a
+
3
b
4
a
−
3
b
=
4
c
+
3
d
4
c
−
3
d
4
a
+
3
d
4
a
−
3
d
=
3
b
+
4
c
3
b
−
4
c
4
a
+
2
b
4
a
−
2
d
=
4
c
+
3
d
4
c
−
2
d
4
a
−
2
b
4
a
−
2
d
=
4
c
−
3
d
4
c
−
2
d
Question
2
2.
If
'b'
is the mean proportional between
'a'
and
'c'
,
then the mean proportional between
(
a
2
+
b
2
)
and
(
b
2
+
c
2
) is
c (a + b)
ab + bc + ca
a (b + c)
b (a + c)
Question
3
3.
What
must be subtracted from
26
,
46
,
18
,
30
so that the resulting numbers
are in proportion ?
6
4
5
7
9
Question
4
4.
Componendo and Dividendo
of
w
:
p
::
q
:
d
p
:
w
::
d
:
q
w
:
q
::
p
:
d
w
+
p
:
p
::
q
+
d
:
d
w
+
p
:
w
−
p
::
q
+
d
:
q
−
d
w
−
p
:
p
::
q
−
d
:
d
Question
5
5.
If
a
:
b
::
c
:
d
,
then
ac = bd
ad = bc
ab = cd
abc = bcd
Question
6
6.
If
a,b,c,d,e,f
are in continued proportion, then which of the following is true?
a
b
=
c
d
=
e
f
a
b
b
c
=
b
c
c
d
=
c
d
d
e
a
b
=
b
c
=
c
d
ab
=
bc
=
cd
=
de
Question
7
7.
Find the product of extremes of
12
:
20
and
2
:
5
58
40
60
59
62
Question
8
8.
Find the mean proportional between
1.5
and
6
3
2
1
4
5
Question
9
9.
Invertendo
of
x
:
h
::
m
:
c
x
−
h
:
h
::
m
−
c
:
c
x
+
h
:
h
::
m
+
c
:
c
x
:
m
::
h
:
c
h
:
x
::
c
:
m
x
+
h
:
x
−
h
::
m
+
c
:
m
−
c
Question
10
10.
Which of the following does not represent a proportion ?
14
:
12
::
42
:
36
24
:
21
::
48
:
42
6
:
5
::
12
:
15
15
:
12
::
60
:
48
16
:
12
::
80
:
60
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