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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade IX - Logarithms
Question
1
1.
log
73.9800
−
log
65.8400
=
log
9.1236
log
1.1236
log
2.1236
log
0.1236
log
3.1236
Question
2
2.
log
10
160
63
=
4
log
2
+
log
5
−
2
log
3
−
log
7
5
log
2
+
log
5
−
2
log
3
−
log
7
5
log
2
+
log
5
−
2
log
3
−
log
10
5
log
2
+
log
5
−
2
log
1
−
log
7
6
log
2
+
log
5
−
2
log
3
−
log
7
Question
3
3.
log
93.1300
+
log
58.6500
=
log
5461.0747
log
5464.0747
log
5460.0747
log
5462.0747
log
5463.0747
Question
4
4.
log
3
28
−
log
38
41
=
log
123
1064
log
125
1064
log
41
354
log
121
1064
log
2
(
123
1064
)
Question
5
5.
log
79
8
−
log
79
5
=
log
79
3
log
76
3
log
81
3
log
79
4
log
79
2
Question
6
6.
Find the value of
x
if
log
(
x
+
7
)
+
log
(
x
−
7
)
=
log
9
(
58
,
(
−
58
)
)
(
√
58
,
(
−
√
58
)
)
(
√
58
,
(
−
58
)
)
(
58
,
(
−
√
58
)
)
Question
7
7.
log
4
16
=
2
0
4
3
1
Question
8
8.
If
log
(
x
2
+
25
)
log
2
x
2
=
1
, find x
(
-5
,
4
)
(
4
,
-5
)
(
-4
,
6
)
(
-3
,
5
)
(
-5
,
5
)
Question
9
9.
log
2898
=
log
46
÷
log
63
log
46
✕
log
63
log
46
−
log
63
63
log
46
log
46
+
log
63
Question
10
10.
The base of
log
5
6
65
is
5
4
1
2
65
5
6
7
6
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