EduSahara™ Assignment
Name : Simplification
Chapter : Logarithms
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
log
1
+
log
5
=
(i)
log
3
(ii)
log
5
2
(iii)
log
8
(iv)
log
5
(v)
log
4
Question
2
2.
log
55
+
log
68
=
(i)
log
3743
(ii)
log
3740
2
(iii)
log
3738
(iv)
log
3739
(v)
log
3740
Question
3
3.
log
4
3
+
log
4
7
=
(i)
log
7
10
(ii)
log
4
11
(iii)
log
4
10
(iv)
log
2
10
(v)
log
4
9
Question
4
4.
log
92
3
+
log
92
6
=
(i)
log
92
9
(ii)
log
95
9
(iii)
log
92
10
(iv)
log
92
8
(v)
log
90
9
Question
5
5.
log
52
−
log
89
=
(i)
log
52
87
(ii)
log
52
89
(iii)
log
54
89
(iv)
log
2
(
52
89
)
(v)
log
50
89
Question
6
6.
log
80
−
log
56
=
(i)
log
2
(ii)
log
10
7
(iii)
log
2
(
10
7
)
(iv)
log
8
7
(v)
log
12
7
Question
7
7.
log
90
−
log
40
=
(i)
log
11
4
(ii)
log
2
(
9
4
)
(iii)
log
9
2
(iv)
log
9
4
(v)
log
7
4
Question
8
8.
log
10
42
=
(i)
log
2
+
2
log
3
+
log
7
(ii)
log
2
+
log
3
+
log
7
(iii)
log
4
+
log
3
+
log
7
(iv)
log
2
+
log
1
+
log
7
(v)
log
1
+
log
3
+
log
7
Question
9
9.
log
10
1470
=
(i)
log
2
+
log
3
+
log
5
+
2
log
4
(ii)
log
2
+
log
3
+
log
4
+
2
log
7
(iii)
log
2
+
log
3
+
log
5
+
2
log
7
(iv)
2
log
2
+
log
3
+
log
5
+
2
log
7
(v)
log
2
+
log
6
+
log
5
+
2
log
7
Question
10
10.
log
1848
=
(i)
log
44
+
log
42
(ii)
42
log
44
(iii)
log
44
÷
log
42
(iv)
log
44
−
log
42
(v)
log
44
✕
log
42
Question
11
11.
log
5
37
=
(i)
log
37
−
log
5
(ii)
log
37
÷
log
5
(iii)
log
37
✕
log
5
(iv)
log
5
÷
log
37
(v)
log
37
+
log
5
Question
12
12.
log
6
81
=
(i)
log
6
89
−
log
81
89
(ii)
log
6
89
+
log
81
89
(iii)
log
6
89
✕
log
81
89
(iv)
log
6
89
÷
log
81
89
(v)
log
81
89
÷
log
6
89
Question
13
13.
log
9
4
=
(i)
log
4
4
✕
log
9
4
(ii)
log
4
4
÷
log
9
4
(iii)
log
9
4
÷
log
4
4
(iv)
log
4
4
−
log
9
4
(v)
log
4
4
+
log
9
4
Question
14
14.
log
4
5
+
log
1
2
=
(i)
log
4
5
(ii)
log
2
(
2
5
)
(iii)
log
-1
(
2
5
)
(iv)
log
2
3
(v)
log
2
5
Question
15
15.
log
7
11
+
log
5
91
=
(i)
log
7
143
(ii)
log
5
143
(iii)
log
3
143
(iv)
log
2
(
5
143
)
(v)
log
5
141
Question
16
16.
log
2
3
+
log
2
3
=
(i)
log
2
4
(ii)
log
2
7
(iii)
log
2
6
(iv)
log
5
6
(v)
log
2
5
Question
17
17.
log
29
3
+
log
29
4
=
(i)
log
27
7
(ii)
log
29
6
(iii)
log
31
7
(iv)
log
29
8
(v)
log
29
7
Question
18
18.
log
6.0000
+
log
9.0000
=
(i)
log
53.0000
(ii)
log
54.0000
(iii)
log
55.0000
(iv)
log
52.0000
(v)
log
56.0000
Question
19
19.
log
74.0000
+
log
98.0000
=
(i)
log
7252.0000
(ii)
log
7253.0000
(iii)
log
7250.0000
(iv)
log
7254.0000
(v)
log
7251.0000
Question
20
20.
log
6
+
log
3
=
(i)
log
16
(ii)
log
18
2
(iii)
log
18
(iv)
log
21
(v)
log
17
Question
21
21.
log
32
+
log
86
=
(i)
log
2752
(ii)
log
2751
(iii)
log
2754
(iv)
log
2752
2
(v)
log
2750
Question
22
22.
log
2
9
+
log
13
19
=
(i)
log
2
13
(ii)
log
26
171
(iii)
log
8
57
(iv)
log
2
(
26
171
)
(v)
log
28
171
Question
23
23.
log
20
9
+
log
20
7
=
(i)
log
20
15
(ii)
log
20
16
(iii)
log
20
17
(iv)
log
18
16
(v)
log
23
16
Question
24
24.
log
64
+
log
54
=
(i)
log
3456
2
(ii)
log
3455
(iii)
log
3458
(iv)
log
3453
(v)
log
3456
Question
25
25.
log
21
32
+
log
5
67
=
(i)
log
103
2144
(ii)
log
105
2144
(iii)
log
107
2144
(iv)
log
2
(
105
2144
)
(v)
log
5
102
Question
26
26.
log
14
6
+
log
14
8
=
(i)
log
14
14
(ii)
log
17
14
(iii)
log
14
13
(iv)
log
14
15
(v)
log
12
14
Question
27
27.
log
26.0000
+
log
63.0000
=
(i)
log
1639.0000
(ii)
log
1640.0000
(iii)
log
1636.0000
(iv)
log
1638.0000
(v)
log
1637.0000
Question
28
28.
log
0.3804
+
log
0.9000
=
(i)
log
8.3424
(ii)
log
0.3424
(iii)
log
1.3424
(iv)
log
7.3424
(v)
log
2.3424
Question
29
29.
log
63
9
+
log
63
5
=
(i)
log
66
14
(ii)
log
63
14
(iii)
log
63
13
(iv)
log
63
15
(v)
log
61
14
Question
30
30.
log
5
8
−
log
42
47
=
(i)
log
235
336
(ii)
log
235
334
(iii)
log
2
(
235
336
)
(iv)
log
79
112
(v)
log
233
336
Question
31
31.
log
1
−
log
1
=
(i)
log
3
-5
(ii)
log
2
-5
(iii)
log
1
(iv)
log
(-2)
-5
Question
32
32.
log
79.0000
−
log
67.0000
=
(i)
log
0.1791
(ii)
log
1.1791
(iii)
log
9.1791
(iv)
log
3.1791
(v)
log
2.1791
Question
33
33.
log
48
53
−
log
38
39
=
(i)
log
936
1007
(ii)
log
312
335
(iii)
log
938
1007
(iv)
log
2
(
936
1007
)
(v)
log
934
1007
Question
34
34.
log
67
8
−
log
67
2
=
(i)
log
69
6
(ii)
log
67
7
(iii)
log
67
6
(iv)
log
67
5
(v)
log
64
6
Question
35
35.
log
93.9600
−
log
35.7000
=
(i)
log
3.6319
(ii)
log
4.6319
(iii)
log
0.6319
(iv)
log
1.6319
(v)
log
2.6319
Question
36
36.
log
49
69
−
log
54
89
=
(i)
log
2
(
4361
3726
)
(ii)
log
4361
3726
(iii)
log
4363
3726
(iv)
log
1453
1242
(v)
log
89
76
Question
37
37.
log
66
2
−
log
66
4
=
(i)
log
68
-2
(ii)
log
64
-2
(iii)
log
66
-3
(iv)
log
66
-2
(v)
log
66
-1
Question
38
38.
log
95.1200
−
log
71.9800
=
(i)
log
2.3215
(ii)
log
3.3215
(iii)
log
1.3215
(iv)
log
9.3215
(v)
log
0.3215
Question
39
39.
log
32
3
−
log
32
4
=
(i)
log
32
-2
(ii)
log
35
-1
(iii)
log
32
-1
(iv)
log
33
-1
(v)
log
29
-1
Question
40
40.
log
3
64
10
=
(i)
9
log
3
64
(ii)
10
log
3
66
(iii)
log
3
-2
61
10
(iv)
11
log
3
64
(v)
10
log
3
64
Question
41
41.
log
10
5
4
=
(i)
2
log
5
−
2
log
2
(ii)
log
5
−
2
log
-1
(iii)
log
5
−
2
log
5
(iv)
log
5
−
2
log
2
(v)
log
4
−
2
log
2
Question
42
42.
log
10
8
35
=
(i)
3
log
2
−
log
5
−
log
5
(ii)
2
log
2
−
log
5
−
log
7
(iii)
3
log
2
−
log
8
−
log
7
(iv)
3
log
2
−
log
5
−
log
7
(v)
4
log
2
−
log
5
−
log
7
Question
43
43.
log
10
280
=
(i)
3
log
2
+
log
5
+
log
7
(ii)
3
log
2
+
log
7
+
log
7
(iii)
3
log
2
+
log
5
+
log
6
(iv)
3
log
2
+
log
5
+
log
5
(v)
3
log
2
+
2
log
5
+
log
7
Question
44
44.
log
10
3150
=
(i)
log
2
+
2
log
3
+
log
5
+
log
7
(ii)
log
2
+
2
log
3
+
2
log
5
+
log
7
(iii)
2
log
2
+
2
log
3
+
2
log
5
+
log
7
(iv)
log
2
+
2
log
6
+
2
log
5
+
log
7
(v)
log
-1
+
2
log
3
+
2
log
5
+
log
7
Question
45
45.
log
3416
=
(i)
56
log
61
(ii)
log
61
+
log
56
(iii)
log
61
−
log
56
(iv)
log
61
✕
log
56
(v)
log
61
÷
log
56
Question
46
46.
log
46
74
=
(i)
log
46
−
log
74
(ii)
log
46
+
log
74
(iii)
log
46
✕
log
74
(iv)
74
log
46
(v)
log
46
÷
log
74
Question
47
47.
log
3
1
2
=
(i)
log
1
2
+
log
3
(ii)
log
1
2
−
log
3
(iii)
log
3
÷
log
1
2
(iv)
log
1
2
÷
log
3
(v)
log
1
2
✕
log
3
Question
48
48.
log
9
29
=
(i)
log
29
✕
log
9
(ii)
log
29
÷
log
9
(iii)
log
9
÷
log
29
(iv)
log
29
+
log
9
(v)
log
29
−
log
9
Question
49
49.
log
4.09
10.4500
=
(i)
log
4.09
÷
log
10.4500
(ii)
log
10.4500
−
log
4.09
(iii)
log
10.4500
+
log
4.09
(iv)
log
10.4500
✕
log
4.09
(v)
log
10.4500
÷
log
4.09
Question
50
50.
log
8
9
61
78
=
(i)
log
61
78
÷
log
8
9
(ii)
log
61
78
+
log
8
9
(iii)
log
8
9
÷
log
61
78
(iv)
log
61
78
✕
log
8
9
(v)
log
61
78
−
log
8
9
Question
51
51.
log
5
3
10
6
=
(i)
6
log
10
✕
3
log
5
(ii)
6
log
10
÷
3
log
5
(iii)
3
log
5
÷
6
log
10
(iv)
6
log
10
+
3
log
5
(v)
6
log
10
−
3
log
5
Question
52
52.
log
5
3
95
3
=
(i)
log
5
95
(ii)
log
2
93
(iii)
log
5
97
(iv)
log
5
94
(v)
2
log
5
95
Question
53
53.
log
2
39
=
(i)
log
2
83
+
log
39
83
(ii)
log
2
83
÷
log
39
83
(iii)
log
2
83
✕
log
39
83
(iv)
log
39
83
÷
log
2
83
(v)
log
2
83
−
log
39
83
Question
54
54.
log
8
6
=
(i)
log
8
4
÷
log
4
6
(ii)
log
4
6
−
log
8
4
(iii)
log
4
6
✕
log
8
4
(iv)
log
4
6
÷
log
8
4
(v)
log
4
6
+
log
8
4
Question
55
55.
log
2
20
2
34
=
(i)
1.7
(ii)
2.7
(iii)
0.7
(iv)
3.7
(v)
9.7
Question
56
56.
log
29.1700
+
log
78.8900
=
(i)
log
2303.2212
(ii)
log
2301.2212
(iii)
log
2300.2212
(iv)
log
2299.2212
(v)
log
2302.2212
Question
57
57.
log
76.2700
+
log
23.2800
=
(i)
log
1775.5656
(ii)
log
1777.5656
(iii)
log
1773.5656
(iv)
log
1776.5656
(v)
log
1774.5656
Question
58
58.
log
82
2
+
log
82
4
=
(i)
log
82
5
(ii)
log
82
6
(iii)
log
80
6
(iv)
log
82
7
(v)
log
84
6
Question
59
59.
log
72.8100
+
log
43.2600
=
(i)
log
3151.7605
(ii)
log
3150.7605
(iii)
log
3147.7605
(iv)
log
3148.7605
(v)
log
3149.7605
Question
60
60.
log
88
−
log
7
=
(i)
log
88
5
(ii)
log
90
7
(iii)
log
2
(
88
7
)
(iv)
log
88
7
(v)
log
86
7
Question
61
61.
log
4
11
−
log
51
89
=
(i)
log
2
(
356
561
)
(ii)
log
358
561
(iii)
log
118
187
(iv)
log
356
561
(v)
log
356
559
Question
62
62.
log
100
4
−
log
100
5
=
(i)
log
101
-1
(ii)
log
102
-1
(iii)
log
100
-2
(iv)
log
98
-1
(v)
log
100
-1
Question
63
63.
log
66.1000
−
log
94.9100
=
(i)
log
1.6964
(ii)
log
0.6964
(iii)
log
2.6964
(iv)
log
7.6964
(v)
log
8.6964
Question
64
64.
log
5
7
49
2
=
(i)
log
3
7
47
2
(ii)
3
log
5
7
49
(iii)
2
log
5
7
52
(iv)
2
log
5
7
49
(v)
log
5
7
49
Question
65
65.
log
10
3
44
10
=
(i)
9
log
10
3
44
(ii)
11
log
10
3
44
(iii)
10
log
10
3
46
(iv)
10
log
10
3
44
(v)
log
7
3
41
10
Question
66
66.
log
41
10
94
9
=
(i)
10
log
41
10
94
(ii)
log
39
10
91
9
(iii)
9
log
41
10
96
(iv)
8
log
41
10
94
(v)
9
log
41
10
94
Question
67
67.
log
10
98
45
=
(i)
log
2
+
2
log
7
−
2
log
3
−
log
3
(ii)
log
2
+
3
log
7
−
2
log
3
−
log
5
(iii)
log
2
+
2
log
7
−
2
log
3
−
log
5
(iv)
log
2
+
log
7
−
2
log
3
−
log
5
(v)
log
2
+
2
log
7
−
2
log
5
−
log
5
Assignment Key
1) (iv)
2) (v)
3) (iii)
4) (i)
5) (ii)
6) (ii)
7) (iv)
8) (ii)
9) (iii)
10) (i)
11) (ii)
12) (iv)
13) (i)
14) (v)
15) (ii)
16) (iii)
17) (v)
18) (ii)
19) (i)
20) (iii)
21) (i)
22) (ii)
23) (ii)
24) (v)
25) (ii)
26) (i)
27) (iv)
28) (ii)
29) (ii)
30) (i)
31) (iii)
32) (ii)
33) (i)
34) (iii)
35) (v)
36) (ii)
37) (iv)
38) (iii)
39) (iii)
40) (v)
41) (iv)
42) (iv)
43) (i)
44) (ii)
45) (ii)
46) (i)
47) (iv)
48) (ii)
49) (v)
50) (i)
51) (ii)
52) (i)
53) (ii)
54) (iii)
55) (i)
56) (ii)
57) (i)
58) (ii)
59) (v)
60) (iv)
61) (iv)
62) (v)
63) (ii)
64) (iv)
65) (iv)
66) (v)
67) (iii)
