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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade IX - Logarithms
Question
1
1.
The base of
log
1
7
1
is
1
(
-1
7
)
1
5
3
7
1
7
Question
2
2.
log
11
12
+
log
10
13
=
log
19
26
log
55
78
log
2
(
55
78
)
log
55
76
log
53
78
Question
3
3.
log
2.0000
−
log
18.0000
=
log
1.1111
log
7.1111
log
0.1111
log
2.1111
log
8.1111
Question
4
4.
log
3
8
18
10
=
10
log
3
8
18
11
log
3
8
18
10
log
3
8
20
log
1
8
15
10
9
log
3
8
18
Question
5
5.
log
2
4
4
4
=
log
-1
2
log
2
3
log
2
4
log
2
7
2
log
2
4
Question
6
6.
log
125
625
=
0.3333
1.3333
3.3333
9.3333
2.3333
Question
7
7.
log
0.9200
−
log
0.0946
=
log
8.7257
log
9.7257
log
7.7257
log
10.7257
log
11.7257
Question
8
8.
If
log
(
x
2
+
1
)
log
2
x
2
=
1
, find x
(
-1
,
0
)
(
0
,
-1
)
(
1
,
1
)
(
-1
,
1
)
(
0
,
2
)
Question
9
9.
log
21
8
+
log
21
6
=
log
21
13
log
23
14
log
19
14
log
21
15
log
21
14
Question
10
10.
log
63
2
+
log
63
5
=
log
61
7
log
65
7
log
63
6
log
63
7
log
63
8
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