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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade IX - Logarithms
Question
1
1.
Find the value of
x
if
log
2
x
=
2
5
3
6
4
1
Question
2
2.
If
log
2 = 0.3010,
log
3 = 0.4771,
log
5 = 0.6989,
log
7 = 0.8451,
the value of
log
10.00
4.5000
is
7.653
2.653
0.653
8.653
1.653
Question
3
3.
log
21
24
+
log
14
64
=
log
2
(
49
256
)
log
51
256
log
47
256
log
49
254
log
49
256
Question
4
4.
The logarithmic notation of
2
2
=
4
is
log
2
-2
1
=
2
log
2
6
=
2
log
2
4
2
=
2
log
2
3
=
2
log
2
4
=
2
Question
5
5.
log
4
8
=
0.5
9.5
1.5
3.5
2.5
Question
6
6.
If
log
4
x
=
p
and
log
4
y
=
q
, then
x
y
=
4
(
p
−
q
)
4
2
p
q
4
p
q
4
(
p
+
q
)
Question
7
7.
log
61
20
80
6
=
6
log
61
20
82
log
59
20
77
6
5
log
61
20
80
7
log
61
20
80
6
log
61
20
80
Question
8
8.
log
67.0000
−
log
1.0000
=
log
67.0000
log
66.0000
log
69.0000
log
65.0000
log
68.0000
Question
9
9.
log
7
8
13
=
log
8
13
÷
log
7
log
7
÷
log
8
13
log
8
13
✕
log
7
log
8
13
+
log
7
log
8
13
−
log
7
Question
10
10.
Express
log
10
x
4
y
z
3
in terms of
log
10
x
,
log
10
y
and
log
10
z
4
log
10
x
−
log
10
y
−
3
log
10
z
4
log
10
x
+
log
10
y
−
3
log
10
z
4
log
10
x
−
log
10
y
+
3
log
10
z
4
log
10
x
+
log
10
y
+
3
log
10
z
4
log
10
x
−
3
log
10
z
+
log
10
y
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