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Class VI
Class VII
Class VIII
Class IX
Class X
ICSE Grade IX - Logarithms
Question
1
1.
log
4
16
=
0
2
1
3
4
Question
2
2.
log
36.0200
+
log
24.8600
=
log
897.4572
log
896.4572
log
895.4572
log
894.4572
log
893.4572
Question
3
3.
If
log
5
x
=
a
and
log
5
y
=
b
, then
5
(
a
+
1
)
=
5
a
5
5
x
5
y
5
b
Question
4
4.
log
52.0000
+
log
53.0000
=
log
2756.0000
log
2754.0000
log
2755.0000
log
2758.0000
log
2757.0000
Question
5
5.
The base of
log
5
4
is
5
3
4
8
Question
6
6.
log
10
45
16
=
2
log
3
+
log
5
−
4
log
5
3
log
3
+
log
5
−
4
log
2
2
log
3
+
log
4
−
4
log
2
2
log
3
+
log
5
−
4
log
2
2
log
3
+
log
5
−
2
log
2
Question
7
7.
Find the value of
x
if
log
5
625
=
x
5
1
7
3
4
Question
8
8.
If
(
x
2
+
y
2
)
=
z
2
, then which of the following is true?
log
(
z
+
y
)
log
(
z
−
y
)
=
3
log
x
(
z
+
y
)
+
log
x
(
z
−
y
)
=
2
log
x
(
z
+
y
)
−
log
x
(
z
−
y
)
=
2
log
x
(
z
+
y
)
+
log
x
(
z
−
y
)
=
5
log
x
(
z
+
y
)
+
log
x
(
z
−
y
)
=
4
Question
9
9.
log
16
8
=
7.75
8.75
1.75
2.75
0.75
Question
10
10.
log
507
100
53
10
=
10
log
507
100
56
11
log
507
100
53
log
101
20
50
10
10
log
507
100
53
9
log
507
100
53
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