EduSahara™ Assignment
Name : Simplification
Chapter : Logarithms
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
log
9
+
log
7
=
(i)
log
65
(ii)
log
63
2
(iii)
log
62
(iv)
log
60
(v)
log
63
Question
2
2.
log
29
+
log
92
=
(i)
log
2671
(ii)
log
2668
2
(iii)
log
2665
(iv)
log
2668
(v)
log
2667
Question
3
3.
log
8
8
+
log
8
3
=
(i)
log
10
11
(ii)
log
6
11
(iii)
log
8
11
(iv)
log
8
10
(v)
log
8
12
Question
4
4.
log
79
10
+
log
79
5
=
(i)
log
79
14
(ii)
log
79
16
(iii)
log
79
15
(iv)
log
77
15
(v)
log
82
15
Question
5
5.
log
1
−
log
82
=
(i)
log
2
(
1
82
)
(ii)
log
1
82
(iii)
log
1
80
(iv)
log
3
82
(v)
log
(
-1
82
)
Question
6
6.
log
87
−
log
12
=
(i)
log
2
(
29
4
)
(ii)
log
27
4
(iii)
log
29
4
(iv)
log
31
4
(v)
log
29
2
Question
7
7.
log
79
−
log
25
=
(i)
log
79
23
(ii)
log
79
25
(iii)
log
77
25
(iv)
log
81
25
(v)
log
2
(
79
25
)
Question
8
8.
log
10
28
=
(i)
2
log
2
+
log
7
(ii)
-1
log
2
+
log
7
(iii)
2
log
2
+
log
9
(iv)
3
log
2
+
log
7
(v)
2
log
2
+
log
6
Question
9
9.
log
10
2800
=
(i)
4
log
2
+
2
log
5
+
log
6
(ii)
4
log
2
+
2
log
5
+
log
4
(iii)
4
log
2
+
2
log
5
+
log
9
(iv)
5
log
2
+
2
log
5
+
log
7
(v)
4
log
2
+
2
log
5
+
log
7
Question
10
10.
log
7790
=
(i)
82
log
95
(ii)
log
95
−
log
82
(iii)
log
95
+
log
82
(iv)
log
95
÷
log
82
(v)
log
95
✕
log
82
Question
11
11.
log
2
45
=
(i)
log
45
÷
log
2
(ii)
log
45
+
log
2
(iii)
log
2
÷
log
45
(iv)
log
45
✕
log
2
(v)
log
45
−
log
2
Question
12
12.
log
4
48
=
(i)
log
4
53
✕
log
48
53
(ii)
log
4
53
−
log
48
53
(iii)
log
48
53
÷
log
4
53
(iv)
log
4
53
÷
log
48
53
(v)
log
4
53
+
log
48
53
Question
13
13.
log
4
47
=
(i)
log
4
47
+
log
4
4
(ii)
log
4
47
−
log
4
4
(iii)
log
4
47
✕
log
4
4
(iv)
log
4
47
÷
log
4
4
(v)
log
4
4
÷
log
4
47
Question
14
14.
log
1
2
+
log
1
2
=
(i)
log
2
(
-1
2
)
(ii)
log
2
(
3
2
)
(iii)
log
2
(
1
2
)
(iv)
log
3
(
1
2
)
(v)
log
1
2
Question
15
15.
log
59
77
+
log
19
45
=
(i)
log
1121
3465
(ii)
log
1123
3465
(iii)
log
1121
3463
(iv)
log
373
1155
(v)
log
2
(
1121
3465
)
Question
16
16.
log
8
8
+
log
8
5
=
(i)
log
10
13
(ii)
log
8
13
(iii)
log
8
12
(iv)
log
8
14
(v)
log
5
13
Question
17
17.
log
39
4
+
log
39
3
=
(i)
log
39
7
(ii)
log
36
7
(iii)
log
39
6
(iv)
log
41
7
(v)
log
39
8
Question
18
18.
log
8.0000
+
log
6.0000
=
(i)
log
49.0000
(ii)
log
50.0000
(iii)
log
48.0000
(iv)
log
47.0000
(v)
log
46.0000
Question
19
19.
log
83.0000
+
log
79.0000
=
(i)
log
6557.0000
(ii)
log
6556.0000
(iii)
log
6558.0000
(iv)
log
6559.0000
(v)
log
6555.0000
Question
20
20.
log
3
+
log
10
=
(i)
log
33
(ii)
log
30
(iii)
log
29
(iv)
log
30
2
(v)
log
28
Question
21
21.
log
30
+
log
32
=
(i)
log
959
(ii)
log
960
(iii)
log
962
(iv)
log
957
(v)
log
960
2
Question
22
22.
log
41
44
+
log
8
71
=
(i)
log
82
781
(ii)
log
80
781
(iii)
log
2
19
(iv)
log
84
781
(v)
log
2
(
82
781
)
Question
23
23.
log
82
6
+
log
82
6
=
(i)
log
82
12
(ii)
log
82
11
(iii)
log
82
13
(iv)
log
80
12
(v)
log
85
12
Question
24
24.
log
5
+
log
86
=
(i)
log
430
(ii)
log
430
2
(iii)
log
427
(iv)
log
429
(v)
log
432
Question
25
25.
log
9
12
+
log
31
75
=
(i)
log
33
100
(ii)
log
29
100
(iii)
log
31
100
(iv)
log
2
(
31
100
)
(v)
log
31
98
Question
26
26.
log
54
7
+
log
54
6
=
(i)
log
54
12
(ii)
log
57
13
(iii)
log
54
14
(iv)
log
54
13
(v)
log
52
13
Question
27
27.
log
83.0000
+
log
83.0000
=
(i)
log
83.0000
(ii)
log
82.0000
(iii)
log
85.0000
(iv)
log
84.0000
(v)
log
81.0000
Question
28
28.
log
0.1739
+
log
0.6316
=
(i)
log
2.1098
(ii)
log
1.1098
(iii)
log
0.1098
(iv)
log
7.1098
(v)
log
8.1098
Question
29
29.
log
75
6
+
log
75
9
=
(i)
log
75
14
(ii)
log
77
15
(iii)
log
73
15
(iv)
log
75
16
(v)
log
75
15
Question
30
30.
log
15
17
−
log
1
2
=
(i)
log
2
(ii)
log
32
17
(iii)
log
28
17
(iv)
log
30
17
(v)
log
2
(
30
17
)
Question
31
31.
log
2
8
−
log
2
9
=
(i)
log
3
-1
(ii)
log
2
-3
(iii)
log
2
-2
(iv)
log
2
-1
(v)
log
4
-1
Question
32
32.
log
57.0000
−
log
23.0000
=
(i)
log
4.4783
(ii)
log
2.4783
(iii)
log
0.4783
(iv)
log
1.4783
(v)
log
3.4783
Question
33
33.
log
3
7
−
log
13
16
=
(i)
log
50
91
(ii)
log
2
(
48
91
)
(iii)
log
46
91
(iv)
log
48
89
(v)
log
48
91
Question
34
34.
log
29
7
−
log
29
2
=
(i)
log
29
6
(ii)
log
29
5
(iii)
log
27
5
(iv)
log
32
5
(v)
log
29
4
Question
35
35.
log
97.1600
−
log
62.0300
=
(i)
log
0.5663
(ii)
log
3.5663
(iii)
log
9.5663
(iv)
log
2.5663
(v)
log
1.5663
Question
36
36.
log
30
61
−
log
72
89
=
(i)
log
89
146
(ii)
log
2
(
445
732
)
(iii)
log
149
244
(iv)
log
445
732
(v)
log
443
732
Question
37
37.
log
17
2
−
log
17
2
=
(i)
log
17
3
(ii)
log
1
(iii)
log
17
-2
(iv)
log
17
(v)
log
17
-1
Question
38
38.
log
59.3700
−
log
31.3900
=
(i)
log
0.8914
(ii)
log
3.8914
(iii)
log
1.8914
(iv)
log
2.8914
(v)
log
9.8914
Question
39
39.
log
22
7
−
log
22
8
=
(i)
log
24
-1
(ii)
log
22
-1
(iii)
log
20
-1
(iv)
log
22
-2
(v)
log
23
-1
Question
40
40.
log
9
76
3
=
(i)
2
log
9
76
(ii)
3
log
9
76
(iii)
4
log
9
76
(iv)
3
log
9
79
(v)
log
6
74
3
Question
41
41.
log
10
7
12
=
(i)
2
log
7
−
2
log
2
−
log
3
(ii)
log
7
−
2
log
2
−
log
1
(iii)
log
7
−
2
log
5
−
log
3
(iv)
log
6
−
2
log
2
−
log
3
(v)
log
7
−
2
log
2
−
log
3
Question
42
42.
log
10
9
7
=
(i)
2
log
3
−
log
7
(ii)
3
log
3
−
log
7
(iii)
2
log
3
−
log
10
(iv)
2
log
3
−
log
5
(v)
log
3
−
log
7
Question
43
43.
log
10
112
=
(i)
2
log
2
+
log
7
(ii)
4
log
2
+
log
7
(iii)
3
log
2
+
log
7
(iv)
5
log
2
+
log
7
(v)
4
log
4
+
log
7
Question
44
44.
log
10
960
=
(i)
6
log
-1
+
log
3
+
log
5
(ii)
5
log
2
+
log
3
+
log
5
(iii)
7
log
2
+
log
3
+
log
5
(iv)
6
log
2
+
log
3
+
log
5
(v)
6
log
5
+
log
3
+
log
5
Question
45
45.
log
1577
=
(i)
log
19
−
log
83
(ii)
83
log
19
(iii)
log
19
÷
log
83
(iv)
log
19
+
log
83
(v)
log
19
✕
log
83
Question
46
46.
log
99
80
=
(i)
log
99
÷
log
80
(ii)
log
99
+
log
80
(iii)
log
99
−
log
80
(iv)
80
log
99
(v)
log
99
✕
log
80
Question
47
47.
log
10
15
68
=
(i)
log
15
68
÷
log
10
(ii)
log
15
68
−
log
10
(iii)
log
15
68
+
log
10
(iv)
log
10
÷
log
15
68
(v)
log
15
68
✕
log
10
Question
48
48.
log
8
5
=
(i)
log
5
÷
log
8
(ii)
log
8
÷
log
5
(iii)
log
5
✕
log
8
(iv)
log
5
+
log
8
(v)
log
5
−
log
8
Question
49
49.
log
10.03
2.9800
=
(i)
log
2.9800
÷
log
10.03
(ii)
log
2.9800
+
log
10.03
(iii)
log
2.9800
−
log
10.03
(iv)
log
10.03
÷
log
2.9800
(v)
log
2.9800
✕
log
10.03
Question
50
50.
log
1
2
45
79
=
(i)
log
1
2
÷
log
45
79
(ii)
log
45
79
✕
log
1
2
(iii)
log
45
79
+
log
1
2
(iv)
log
45
79
÷
log
1
2
(v)
log
45
79
−
log
1
2
Question
51
51.
log
7
2
27
9
=
(i)
9
log
27
−
2
log
7
(ii)
9
log
27
✕
2
log
7
(iii)
9
log
27
+
2
log
7
(iv)
2
log
7
÷
9
log
27
(v)
9
log
27
÷
2
log
7
Question
52
52.
log
10
6
80
10
=
(i)
5
3
log
10
80
(ii)
5
3
log
10
83
(iii)
10
3
log
10
80
(iv)
5
3
log
7
77
(v)
5
3
log
10
79
Question
53
53.
log
8
55
=
(i)
log
8
36
÷
log
55
36
(ii)
log
8
36
✕
log
55
36
(iii)
log
8
36
−
log
55
36
(iv)
log
55
36
÷
log
8
36
(v)
log
8
36
+
log
55
36
Question
54
54.
log
9
20
=
(i)
log
5
20
✕
log
9
5
(ii)
log
5
20
−
log
9
5
(iii)
log
5
20
÷
log
9
5
(iv)
log
5
20
+
log
9
5
(v)
log
9
5
÷
log
5
20
Question
55
55.
log
24
17
24
5
=
(i)
0.2941
(ii)
2.2941
(iii)
7.2941
(iv)
8.2941
(v)
1.2941
Question
56
56.
log
73.9500
+
log
77.5700
=
(i)
log
5736.3013
(ii)
log
5734.3013
(iii)
log
5737.3013
(iv)
log
5735.3013
(v)
log
5738.3013
Question
57
57.
log
37.2900
+
log
11.2400
=
(i)
log
417.1396
(ii)
log
421.1396
(iii)
log
420.1396
(iv)
log
418.1396
(v)
log
419.1396
Question
58
58.
log
37
7
+
log
37
6
=
(i)
log
37
13
(ii)
log
35
13
(iii)
log
37
14
(iv)
log
40
13
(v)
log
37
12
Question
59
59.
log
26.1600
+
log
42.6900
=
(i)
log
1118.7704
(ii)
log
1114.7704
(iii)
log
1117.7704
(iv)
log
1116.7704
(v)
log
1115.7704
Question
60
60.
log
94
−
log
14
=
(i)
log
45
7
(ii)
log
47
5
(iii)
log
2
(
47
7
)
(iv)
log
47
7
(v)
log
7
Question
61
61.
log
29
47
−
log
10
33
=
(i)
log
959
470
(ii)
log
191
94
(iii)
log
957
470
(iv)
log
2
(
957
470
)
(v)
log
319
156
Question
62
62.
log
39
8
−
log
39
6
=
(i)
log
39
(ii)
log
42
2
(iii)
log
39
2
(iv)
log
36
2
(v)
log
39
3
Question
63
63.
log
63.1900
−
log
62.3000
=
(i)
log
1.0143
(ii)
log
2.0143
(iii)
log
0.0143
(iv)
log
9.0143
(v)
log
3.0143
Question
64
64.
log
1
4
2
3
=
(i)
log
(
-1
4
)
(-1)
3
(ii)
3
log
1
4
2
(iii)
3
log
1
4
5
(iv)
2
log
1
4
2
(v)
4
log
1
4
2
Question
65
65.
log
8
9
2
7
=
(i)
7
log
8
9
2
(ii)
7
log
8
9
5
(iii)
log
5
9
2
4
(iv)
6
log
8
9
2
(v)
8
log
8
9
2
Question
66
66.
log
503
100
65
9
=
(i)
log
501
100
63
9
(ii)
10
log
503
100
65
(iii)
9
log
503
100
65
(iv)
8
log
503
100
65
(v)
9
log
503
100
67
Question
67
67.
log
10
27
50
=
(i)
3
log
3
−
log
2
−
2
log
7
(ii)
3
log
3
−
log
2
−
2
log
5
(iii)
4
log
3
−
log
2
−
2
log
5
(iv)
2
log
3
−
log
2
−
2
log
5
(v)
3
log
3
−
-2
log
2
−
2
log
5
Assignment Key
1) (v)
2) (iv)
3) (iii)
4) (iii)
5) (ii)
6) (iii)
7) (ii)
8) (i)
9) (v)
10) (iii)
11) (i)
12) (iv)
13) (iii)
14) (iii)
15) (i)
16) (ii)
17) (i)
18) (iii)
19) (i)
20) (ii)
21) (ii)
22) (i)
23) (i)
24) (i)
25) (iii)
26) (iv)
27) (i)
28) (iii)
29) (v)
30) (iv)
31) (iv)
32) (ii)
33) (v)
34) (ii)
35) (v)
36) (iv)
37) (ii)
38) (iii)
39) (ii)
40) (ii)
41) (v)
42) (i)
43) (ii)
44) (iv)
45) (iv)
46) (iii)
47) (i)
48) (i)
49) (i)
50) (iv)
51) (v)
52) (i)
53) (i)
54) (i)
55) (i)
56) (i)
57) (v)
58) (i)
59) (iv)
60) (iv)
61) (iii)
62) (iii)
63) (i)
64) (ii)
65) (i)
66) (iii)
67) (ii)
