EduSahara™ Assignment
Name : Simplification
Chapter : Logarithms
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
log
2
+
log
6
=
(i)
log
11
(ii)
log
14
(iii)
log
12
(iv)
log
10
(v)
log
12
2
Question
2
2.
log
71
+
log
3
=
(i)
log
213
2
(ii)
log
212
(iii)
log
213
(iv)
log
215
(v)
log
210
Question
3
3.
log
7
6
+
log
7
5
=
(i)
log
7
11
(ii)
log
4
11
(iii)
log
7
10
(iv)
log
10
11
(v)
log
7
12
Question
4
4.
log
68
3
+
log
68
10
=
(i)
log
68
13
(ii)
log
68
12
(iii)
log
65
13
(iv)
log
71
13
(v)
log
68
14
Question
5
5.
log
16
−
log
50
=
(i)
log
8
23
(ii)
log
2
5
(iii)
log
2
(
8
25
)
(iv)
log
6
25
(v)
log
8
25
Question
6
6.
log
95
−
log
91
=
(i)
log
95
89
(ii)
log
97
91
(iii)
log
93
91
(iv)
log
2
(
95
91
)
(v)
log
95
91
Question
7
7.
log
91
−
log
75
=
(i)
log
91
73
(ii)
log
2
(
91
75
)
(iii)
log
31
25
(iv)
log
91
75
(v)
log
89
75
Question
8
8.
log
10
108
=
(i)
2
log
2
+
3
log
3
(ii)
2
log
2
+
3
log
5
(iii)
log
2
+
3
log
3
(iv)
3
log
2
+
3
log
3
(v)
2
log
-1
+
3
log
3
Question
9
9.
log
10
1125
=
(i)
3
log
3
+
3
log
5
(ii)
2
log
3
+
3
log
3
(iii)
2
log
3
+
3
log
5
(iv)
2
log
3
+
2
log
5
(v)
2
log
6
+
3
log
5
Question
10
10.
log
1960
=
(i)
log
98
÷
log
20
(ii)
log
98
−
log
20
(iii)
20
log
98
(iv)
log
98
✕
log
20
(v)
log
98
+
log
20
Question
11
11.
log
10
46
=
(i)
log
46
+
log
10
(ii)
log
46
÷
log
10
(iii)
log
46
−
log
10
(iv)
log
10
÷
log
46
(v)
log
46
✕
log
10
Question
12
12.
log
7
7
=
(i)
log
7
79
÷
log
7
79
(ii)
log
7
79
+
log
7
79
(iii)
log
7
79
−
log
7
79
(iv)
log
7
79
✕
log
7
79
Question
13
13.
log
6
19
=
(i)
log
9
19
+
log
6
9
(ii)
log
9
19
÷
log
6
9
(iii)
log
9
19
−
log
6
9
(iv)
log
9
19
✕
log
6
9
(v)
log
6
9
÷
log
9
19
Question
14
14.
log
1
3
+
log
2
3
=
(i)
log
2
(
2
9
)
(ii)
log
4
9
(iii)
log
2
9
(iv)
log
2
7
(v)
log
-1
(
2
9
)
Question
15
15.
log
33
47
+
log
19
27
=
(i)
log
209
421
(ii)
log
2
(
209
423
)
(iii)
log
23
47
(iv)
log
211
423
(v)
log
209
423
Question
16
16.
log
3
8
+
log
3
7
=
(i)
log
1
(ii)
log
3
15
(iii)
log
6
15
(iv)
log
3
14
(v)
log
3
16
Question
17
17.
log
32
7
+
log
32
9
=
(i)
log
30
16
(ii)
log
32
15
(iii)
log
32
17
(iv)
log
32
16
(v)
log
35
16
Question
18
18.
log
6.0000
+
log
5.0000
=
(i)
log
30.0000
(ii)
log
31.0000
(iii)
log
28.0000
(iv)
log
32.0000
(v)
log
29.0000
Question
19
19.
log
59.0000
+
log
6.0000
=
(i)
log
353.0000
(ii)
log
356.0000
(iii)
log
352.0000
(iv)
log
355.0000
(v)
log
354.0000
Question
20
20.
log
9
+
log
6
=
(i)
log
54
2
(ii)
log
54
(iii)
log
53
(iv)
log
51
(v)
log
56
Question
21
21.
log
50
+
log
76
=
(i)
log
3800
2
(ii)
log
3797
(iii)
log
3803
(iv)
log
3800
(v)
log
3799
Question
22
22.
log
7
13
+
log
27
76
=
(i)
log
191
988
(ii)
log
189
988
(iii)
log
187
988
(iv)
log
2
(
189
988
)
(v)
log
189
986
Question
23
23.
log
19
5
+
log
19
2
=
(i)
log
17
7
(ii)
log
19
6
(iii)
log
19
7
(iv)
log
21
7
(v)
log
19
8
Question
24
24.
log
75
+
log
95
=
(i)
log
7125
2
(ii)
log
7127
(iii)
log
7122
(iv)
log
7124
(v)
log
7125
Question
25
25.
log
9
80
+
log
38
68
=
(i)
log
169
2720
(ii)
log
171
2720
(iii)
log
19
302
(iv)
log
173
2720
(v)
log
2
(
171
2720
)
Question
26
26.
log
38
5
+
log
38
9
=
(i)
log
40
14
(ii)
log
38
13
(iii)
log
36
14
(iv)
log
38
14
(v)
log
38
15
Question
27
27.
log
33.0000
+
log
44.0000
=
(i)
log
1452.0000
(ii)
log
1450.0000
(iii)
log
1454.0000
(iv)
log
1451.0000
(v)
log
1453.0000
Question
28
28.
log
0.7429
+
log
0.1200
=
(i)
log
2.0891
(ii)
log
0.0891
(iii)
log
1.0891
(iv)
log
8.0891
(v)
log
7.0891
Question
29
29.
log
79
2
+
log
79
8
=
(i)
log
79
11
(ii)
log
82
10
(iii)
log
79
10
(iv)
log
76
10
(v)
log
79
9
Question
30
30.
log
2
5
−
log
1
85
=
(i)
log
31
(ii)
log
33
(iii)
log
34
(iv)
log
36
(v)
log
34
2
Question
31
31.
log
2
5
−
log
2
3
=
(i)
log
5
2
(ii)
log
2
3
(iii)
log
2
-1
(iv)
log
2
2
(v)
log
2
Question
32
32.
log
88.0000
−
log
74.0000
=
(i)
log
9.1892
(ii)
log
0.1892
(iii)
log
2.1892
(iv)
log
1.1892
(v)
log
3.1892
Question
33
33.
log
5
8
−
log
1
3
=
(i)
log
2
(
15
8
)
(ii)
log
13
8
(iii)
log
15
8
(iv)
log
5
2
(v)
log
17
8
Question
34
34.
log
51
6
−
log
51
5
=
(i)
log
51
2
(ii)
log
54
(iii)
log
50
(iv)
log
49
(v)
log
51
Question
35
35.
log
22.3900
−
log
90.1900
=
(i)
log
1.2483
(ii)
log
2.2483
(iii)
log
8.2483
(iv)
log
0.2483
(v)
log
7.2483
Question
36
36.
log
36
51
−
log
5
49
=
(i)
log
588
85
(ii)
log
588
83
(iii)
log
2
(
588
85
)
(iv)
log
586
85
(v)
log
118
17
Question
37
37.
log
57
7
−
log
57
10
=
(i)
log
57
-2
(ii)
log
57
-4
(iii)
log
57
-3
(iv)
log
55
-3
(v)
log
59
-3
Question
38
38.
log
54.2500
−
log
18.7600
=
(i)
log
4.8918
(ii)
log
3.8918
(iii)
log
2.8918
(iv)
log
1.8918
(v)
log
0.8918
Question
39
39.
log
2
9
−
log
2
2
=
(i)
log
2
7
(ii)
log
2
8
(iii)
log
(-1)
7
(iv)
log
2
6
(v)
log
4
7
Question
40
40.
log
5
38
9
=
(i)
10
log
5
38
(ii)
log
3
36
9
(iii)
8
log
5
38
(iv)
9
log
5
40
(v)
9
log
5
38
Question
41
41.
log
10
3
2
=
(i)
log
2
−
log
2
(ii)
log
3
−
log
5
(iii)
log
3
−
log
-1
(iv)
2
log
3
−
log
2
(v)
log
3
−
log
2
Question
42
42.
log
10
15
=
(i)
-1
log
3
+
log
5
(ii)
log
3
+
log
4
(iii)
log
3
+
2
log
5
(iv)
log
5
+
log
5
(v)
log
3
+
log
5
Question
43
43.
log
10
210
=
(i)
log
2
+
log
3
+
log
7
+
log
7
(ii)
log
1
+
log
3
+
log
5
+
log
7
(iii)
log
2
+
log
3
+
log
5
+
2
log
7
(iv)
log
2
+
log
3
+
log
3
+
log
7
(v)
log
2
+
log
3
+
log
5
+
log
7
Question
44
44.
log
10
108
=
(i)
2
log
2
+
3
log
3
(ii)
log
2
+
3
log
3
(iii)
2
log
2
+
4
log
3
(iv)
2
log
2
+
log
3
(v)
2
log
4
+
3
log
3
Question
45
45.
log
7047
=
(i)
log
87
✕
log
81
(ii)
81
log
87
(iii)
log
87
+
log
81
(iv)
log
87
÷
log
81
(v)
log
87
−
log
81
Question
46
46.
log
3
12
=
(i)
log
3
✕
log
12
(ii)
log
3
−
log
12
(iii)
12
log
3
(iv)
log
3
+
log
12
(v)
log
3
÷
log
12
Question
47
47.
log
9
3
7
=
(i)
log
3
7
÷
log
9
(ii)
log
3
7
−
log
9
(iii)
log
9
÷
log
3
7
(iv)
log
3
7
✕
log
9
(v)
log
3
7
+
log
9
Question
48
48.
log
7
97
=
(i)
log
97
÷
log
7
(ii)
log
97
+
log
7
(iii)
log
97
−
log
7
(iv)
log
7
÷
log
97
(v)
log
97
✕
log
7
Question
49
49.
log
6.06
1.5300
=
(i)
log
1.5300
✕
log
6.06
(ii)
log
1.5300
÷
log
6.06
(iii)
log
6.06
÷
log
1.5300
(iv)
log
1.5300
−
log
6.06
(v)
log
1.5300
+
log
6.06
Question
50
50.
log
1
2
1
4
=
(i)
log
1
4
✕
log
1
2
(ii)
log
1
4
−
log
1
2
(iii)
log
1
4
+
log
1
2
(iv)
log
1
2
÷
log
1
4
(v)
log
1
4
÷
log
1
2
Question
51
51.
log
2
6
95
6
=
(i)
6
log
2
÷
6
log
95
(ii)
6
log
95
÷
6
log
2
(iii)
6
log
95
✕
6
log
2
(iv)
6
log
95
−
6
log
2
(v)
6
log
95
+
6
log
2
Question
52
52.
log
5
4
49
2
=
(i)
1
2
log
5
51
(ii)
1
2
log
5
48
(iii)
1
2
log
5
49
(iv)
1
2
log
2
47
(v)
log
5
49
Question
53
53.
log
2
7
=
(i)
log
2
1
÷
log
7
1
(ii)
log
2
1
−
log
7
1
(iii)
log
2
1
✕
log
7
1
(iv)
log
7
1
÷
log
2
1
(v)
log
2
1
+
log
7
1
Question
54
54.
log
5
71
=
(i)
log
5
71
✕
log
5
5
(ii)
log
5
5
÷
log
5
71
(iii)
log
5
71
−
log
5
5
(iv)
log
5
71
÷
log
5
5
(v)
log
5
71
+
log
5
5
Question
55
55.
log
27
11
27
4
=
(i)
0.3636
(ii)
8.3636
(iii)
2.3636
(iv)
1.3636
(v)
7.3636
Question
56
56.
log
96.9000
+
log
16.7500
=
(i)
log
1623.0750
(ii)
log
1621.0750
(iii)
log
1624.0750
(iv)
log
1625.0750
(v)
log
1622.0750
Question
57
57.
log
58.5400
+
log
19.0200
=
(i)
log
1113.4308
(ii)
log
1111.4308
(iii)
log
1112.4308
(iv)
log
1115.4308
(v)
log
1114.4308
Question
58
58.
log
16
9
+
log
16
8
=
(i)
log
14
17
(ii)
log
16
17
(iii)
log
18
17
(iv)
log
16
16
(v)
log
16
18
Question
59
59.
log
7.1200
+
log
13.1500
=
(i)
log
91.6280
(ii)
log
95.6280
(iii)
log
92.6280
(iv)
log
94.6280
(v)
log
93.6280
Question
60
60.
log
80
−
log
82
=
(i)
log
40
39
(ii)
log
38
41
(iii)
log
2
(
40
41
)
(iv)
log
40
41
(v)
log
42
41
Question
61
61.
log
14
23
−
log
1
3
=
(i)
log
2
(ii)
log
2
(
42
23
)
(iii)
log
44
23
(iv)
log
42
23
(v)
log
40
23
Question
62
62.
log
12
5
−
log
12
7
=
(i)
log
12
-1
(ii)
log
12
-3
(iii)
log
12
-2
(iv)
log
15
-2
(v)
log
9
-2
Question
63
63.
log
48.0100
−
log
39.0300
=
(i)
log
3.2301
(ii)
log
2.2301
(iii)
log
9.2301
(iv)
log
1.2301
(v)
log
0.2301
Question
64
64.
log
1
8
98
9
=
(i)
8
log
1
8
98
(ii)
log
(
-1
8
)
95
9
(iii)
10
log
1
8
98
(iv)
9
log
1
8
98
(v)
9
log
1
8
101
Question
65
65.
log
8
6
12
5
=
(i)
5
log
8
6
14
(ii)
6
log
8
6
12
(iii)
4
log
8
6
12
(iv)
5
log
8
6
12
(v)
log
5
6
10
5
Question
66
66.
log
41
20
83
7
=
(i)
log
39
20
81
7
(ii)
8
log
41
20
83
(iii)
6
log
41
20
83
(iv)
7
log
41
20
83
(v)
7
log
41
20
86
Question
67
67.
log
10
27
20
=
(i)
3
log
3
−
2
log
4
−
log
5
(ii)
3
log
3
−
2
log
2
−
log
5
(iii)
3
log
3
−
2
log
2
−
log
3
(iv)
4
log
3
−
2
log
2
−
log
5
(v)
2
log
3
−
2
log
2
−
log
5
Assignment Key
1) (iii)
2) (iii)
3) (i)
4) (i)
5) (v)
6) (v)
7) (iv)
8) (i)
9) (iii)
10) (v)
11) (ii)
12) (i)
13) (iv)
14) (iii)
15) (v)
16) (ii)
17) (iv)
18) (i)
19) (v)
20) (ii)
21) (iv)
22) (ii)
23) (iii)
24) (v)
25) (ii)
26) (iv)
27) (i)
28) (ii)
29) (iii)
30) (iii)
31) (iv)
32) (iv)
33) (iii)
34) (v)
35) (iv)
36) (i)
37) (iii)
38) (iii)
39) (i)
40) (v)
41) (v)
42) (v)
43) (v)
44) (i)
45) (iii)
46) (ii)
47) (i)
48) (i)
49) (ii)
50) (v)
51) (ii)
52) (iii)
53) (i)
54) (i)
55) (i)
56) (i)
57) (i)
58) (ii)
59) (v)
60) (iv)
61) (iv)
62) (iii)
63) (iv)
64) (iv)
65) (iv)
66) (iv)
67) (ii)
