EduSahara™ Assignment
Name : Simplification
Chapter : Logarithms
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
log
4
+
log
3
=
(i)
log
15
(ii)
log
10
(iii)
log
12
(iv)
log
12
2
(v)
log
11
Question
2
2.
log
86
+
log
20
=
(i)
log
1720
2
(ii)
log
1719
(iii)
log
1720
(iv)
log
1723
(v)
log
1717
Question
3
3.
log
8
6
+
log
8
7
=
(i)
log
6
13
(ii)
log
11
13
(iii)
log
8
14
(iv)
log
8
12
(v)
log
8
13
Question
4
4.
log
58
8
+
log
58
4
=
(i)
log
58
11
(ii)
log
56
12
(iii)
log
58
12
(iv)
log
61
12
(v)
log
58
13
Question
5
5.
log
61
−
log
24
=
(i)
log
61
24
(ii)
log
21
8
(iii)
log
59
24
(iv)
log
61
22
(v)
log
2
(
61
24
)
Question
6
6.
log
62
−
log
81
=
(i)
log
62
79
(ii)
log
62
81
(iii)
log
64
81
(iv)
log
20
27
(v)
log
2
(
62
81
)
Question
7
7.
log
23
−
log
38
=
(i)
log
21
38
(ii)
log
25
38
(iii)
log
23
36
(iv)
log
23
38
(v)
log
2
(
23
38
)
Question
8
8.
log
10
80
=
(i)
4
log
2
+
log
7
(ii)
3
log
2
+
log
5
(iii)
4
log
2
+
log
5
(iv)
4
log
2
+
log
3
(v)
4
log
2
+
2
log
5
Question
9
9.
log
10
384
=
(i)
7
log
2
+
log
2
(ii)
7
log
2
+
log
1
(iii)
7
log
5
+
log
3
(iv)
7
log
2
+
log
3
(v)
7
log
2
+
2
log
3
Question
10
10.
log
2898
=
(i)
log
69
+
log
42
(ii)
log
69
÷
log
42
(iii)
log
69
✕
log
42
(iv)
log
69
−
log
42
(v)
42
log
69
Question
11
11.
log
2
9
=
(i)
log
9
✕
log
2
(ii)
log
9
÷
log
2
(iii)
log
9
−
log
2
(iv)
log
9
+
log
2
(v)
log
2
÷
log
9
Question
12
12.
log
2
14
=
(i)
log
14
98
÷
log
2
98
(ii)
log
2
98
−
log
14
98
(iii)
log
2
98
÷
log
14
98
(iv)
log
2
98
✕
log
14
98
(v)
log
2
98
+
log
14
98
Question
13
13.
log
10
16
=
(i)
log
6
16
−
log
10
6
(ii)
log
6
16
÷
log
10
6
(iii)
log
6
16
+
log
10
6
(iv)
log
10
6
÷
log
6
16
(v)
log
6
16
✕
log
10
6
Question
14
14.
log
3
10
+
log
2
3
=
(i)
log
3
5
(ii)
log
1
5
(iii)
log
2
(
1
5
)
(iv)
log
(
-1
5
)
(v)
log
1
3
Question
15
15.
log
71
94
+
log
9
25
=
(i)
log
639
2348
(ii)
log
641
2350
(iii)
log
639
2350
(iv)
log
637
2350
(v)
log
2
(
639
2350
)
Question
16
16.
log
3
7
+
log
3
8
=
(i)
log
3
16
(ii)
log
6
15
(iii)
log
1
(iv)
log
3
15
(v)
log
3
14
Question
17
17.
log
33
9
+
log
33
6
=
(i)
log
33
16
(ii)
log
31
15
(iii)
log
35
15
(iv)
log
33
14
(v)
log
33
15
Question
18
18.
log
6.0000
+
log
5.0000
=
(i)
log
29.0000
(ii)
log
28.0000
(iii)
log
31.0000
(iv)
log
30.0000
(v)
log
32.0000
Question
19
19.
log
44.0000
+
log
19.0000
=
(i)
log
834.0000
(ii)
log
838.0000
(iii)
log
836.0000
(iv)
log
835.0000
(v)
log
837.0000
Question
20
20.
log
2
+
log
5
=
(i)
log
9
(ii)
log
13
(iii)
log
10
2
(iv)
log
7
(v)
log
10
Question
21
21.
log
61
+
log
10
=
(i)
log
610
2
(ii)
log
610
(iii)
log
608
(iv)
log
613
(v)
log
609
Question
22
22.
log
2
3
+
log
3
5
=
(i)
log
4
5
(ii)
log
2
5
(iii)
log
2
3
(iv)
log
-2
(
2
5
)
(v)
log
2
(
2
5
)
Question
23
23.
log
36
9
+
log
36
2
=
(i)
log
34
11
(ii)
log
36
11
(iii)
log
36
12
(iv)
log
38
11
(v)
log
36
10
Question
24
24.
log
28
+
log
21
=
(i)
log
588
2
(ii)
log
591
(iii)
log
587
(iv)
log
588
(v)
log
586
Question
25
25.
log
17
25
+
log
1
2
=
(i)
log
17
48
(ii)
log
17
50
(iii)
log
2
(
17
50
)
(iv)
log
3
10
(v)
log
19
50
Question
26
26.
log
59
4
+
log
59
4
=
(i)
log
59
9
(ii)
log
59
7
(iii)
log
59
8
(iv)
log
62
8
(v)
log
57
8
Question
27
27.
log
75.0000
+
log
64.0000
=
(i)
log
4799.0000
(ii)
log
4802.0000
(iii)
log
4798.0000
(iv)
log
4801.0000
(v)
log
4800.0000
Question
28
28.
log
0.4118
+
log
0.9444
=
(i)
log
7.3889
(ii)
log
2.3889
(iii)
log
0.3889
(iv)
log
8.3889
(v)
log
1.3889
Question
29
29.
log
63
2
+
log
63
4
=
(i)
log
60
6
(ii)
log
63
6
(iii)
log
63
5
(iv)
log
63
7
(v)
log
65
6
Question
30
30.
log
24
25
−
log
31
49
=
(i)
log
1176
775
(ii)
log
38
25
(iii)
log
2
(
1176
775
)
(iv)
log
1174
775
(v)
log
1176
773
Question
31
31.
log
5
6
−
log
5
7
=
(i)
log
6
-1
(ii)
log
2
-1
(iii)
log
5
-2
(iv)
log
7
-1
(v)
log
5
-1
Question
32
32.
log
37.0000
−
log
90.0000
=
(i)
log
7.4111
(ii)
log
1.4111
(iii)
log
8.4111
(iv)
log
0.4111
(v)
log
2.4111
Question
33
33.
log
23
35
−
log
2
45
=
(i)
log
207
14
(ii)
log
69
4
(iii)
log
2
(
207
14
)
(iv)
log
209
14
(v)
log
205
14
Question
34
34.
log
65
4
−
log
65
5
=
(i)
log
66
-1
(ii)
log
67
-1
(iii)
log
65
-2
(iv)
log
63
-1
(v)
log
65
-1
Question
35
35.
log
62.6200
−
log
19.0300
=
(i)
log
5.2906
(ii)
log
2.2906
(iii)
log
3.2906
(iv)
log
4.2906
(v)
log
1.2906
Question
36
36.
log
26
70
−
log
32
40
=
(i)
log
1
2
(ii)
log
2
(
13
28
)
(iii)
log
15
28
(iv)
log
11
28
(v)
log
13
28
Question
37
37.
log
59
6
−
log
59
8
=
(i)
log
61
-2
(ii)
log
57
-2
(iii)
log
59
-2
(iv)
log
59
-1
(v)
log
59
-3
Question
38
38.
log
12.4700
−
log
2.2000
=
(i)
log
4.6682
(ii)
log
7.6682
(iii)
log
6.6682
(iv)
log
5.6682
(v)
log
3.6682
Question
39
39.
log
46
10
−
log
46
9
=
(i)
log
46
(ii)
log
45
(iii)
log
43
(iv)
log
49
(v)
log
46
2
Question
40
40.
log
8
82
5
=
(i)
5
log
8
85
(ii)
4
log
8
82
(iii)
log
6
79
5
(iv)
6
log
8
82
(v)
5
log
8
82
Question
41
41.
log
10
27
8
=
(i)
3
log
5
2
(ii)
2
log
3
2
(iii)
3
log
3
2
(iv)
3
log
1
2
(v)
4
log
3
2
Question
42
42.
log
10
81
7
=
(i)
4
log
3
−
log
10
(ii)
5
log
3
−
log
7
(iii)
4
log
3
−
log
5
(iv)
3
log
3
−
log
7
(v)
4
log
3
−
log
7
Question
43
43.
log
10
216
=
(i)
log
2
+
3
log
3
(ii)
4
log
2
+
3
log
3
(iii)
2
log
2
+
3
log
3
(iv)
3
log
4
+
3
log
3
(v)
3
log
2
+
3
log
3
Question
44
44.
log
10
640
=
(i)
7
log
2
+
log
5
(ii)
8
log
2
+
log
5
(iii)
5
log
2
+
log
5
(iv)
7
log
4
+
log
5
(v)
7
log
2
+
log
4
Question
45
45.
log
2002
=
(i)
log
26
÷
log
77
(ii)
log
26
−
log
77
(iii)
77
log
26
(iv)
log
26
+
log
77
(v)
log
26
✕
log
77
Question
46
46.
log
18
68
=
(i)
68
log
18
(ii)
log
18
÷
log
68
(iii)
log
18
−
log
68
(iv)
log
18
+
log
68
(v)
log
18
✕
log
68
Question
47
47.
log
6
15
28
=
(i)
log
15
28
−
log
6
(ii)
log
15
28
+
log
6
(iii)
log
6
÷
log
15
28
(iv)
log
15
28
÷
log
6
(v)
log
15
28
✕
log
6
Question
48
48.
log
5
56
=
(i)
log
5
÷
log
56
(ii)
log
56
✕
log
5
(iii)
log
56
+
log
5
(iv)
log
56
−
log
5
(v)
log
56
÷
log
5
Question
49
49.
log
7.04
49.6400
=
(i)
log
49.6400
÷
log
7.04
(ii)
log
49.6400
−
log
7.04
(iii)
log
7.04
÷
log
49.6400
(iv)
log
49.6400
✕
log
7.04
(v)
log
49.6400
+
log
7.04
Question
50
50.
log
2
3
5
13
=
(i)
log
2
3
÷
log
5
13
(ii)
log
5
13
+
log
2
3
(iii)
log
5
13
✕
log
2
3
(iv)
log
5
13
−
log
2
3
(v)
log
5
13
÷
log
2
3
Question
51
51.
log
2
9
52
8
=
(i)
9
log
2
÷
8
log
52
(ii)
8
log
52
+
9
log
2
(iii)
8
log
52
−
9
log
2
(iv)
8
log
52
✕
9
log
2
(v)
8
log
52
÷
9
log
2
Question
52
52.
log
6
10
42
3
=
(i)
3
5
log
6
42
(ii)
3
10
log
6
41
(iii)
3
10
log
6
42
(iv)
3
10
log
4
39
(v)
3
10
log
6
45
Question
53
53.
log
5
40
=
(i)
log
5
63
+
log
40
63
(ii)
log
5
63
−
log
40
63
(iii)
log
5
63
✕
log
40
63
(iv)
log
40
63
÷
log
5
63
(v)
log
5
63
÷
log
40
63
Question
54
54.
log
3
94
=
(i)
log
3
94
−
log
3
3
(ii)
log
3
94
÷
log
3
3
(iii)
log
3
3
÷
log
3
94
(iv)
log
3
94
+
log
3
3
(v)
log
3
94
✕
log
3
3
Question
55
55.
log
36
6
36
40
=
(i)
5.6667
(ii)
6.6667
(iii)
7.6667
(iv)
8.6667
(v)
4.6667
Question
56
56.
log
90.0800
+
log
83.0200
=
(i)
log
7477.4414
(ii)
log
7480.4414
(iii)
log
7479.4414
(iv)
log
7478.4414
(v)
log
7476.4414
Question
57
57.
log
74.8300
+
log
25.6600
=
(i)
log
1918.1378
(ii)
log
1922.1378
(iii)
log
1920.1378
(iv)
log
1921.1378
(v)
log
1919.1378
Question
58
58.
log
63
10
+
log
63
2
=
(i)
log
61
12
(ii)
log
63
12
(iii)
log
65
12
(iv)
log
63
11
(v)
log
63
13
Question
59
59.
log
14.7100
+
log
45.8600
=
(i)
log
674.6006
(ii)
log
675.6006
(iii)
log
673.6006
(iv)
log
672.6006
(v)
log
676.6006
Question
60
60.
log
41
−
log
3
=
(i)
log
41
(ii)
log
41
3
(iii)
log
43
3
(iv)
log
2
(
41
3
)
(v)
log
13
Question
61
61.
log
18
79
−
log
13
18
=
(i)
log
324
1027
(ii)
log
324
1025
(iii)
log
322
1027
(iv)
log
2
(
324
1027
)
(v)
log
326
1027
Question
62
62.
log
47
3
−
log
47
5
=
(i)
log
49
-2
(ii)
log
47
-2
(iii)
log
45
-2
(iv)
log
47
-3
(v)
log
47
-1
Question
63
63.
log
28.1900
−
log
58.8900
=
(i)
log
2.4787
(ii)
log
7.4787
(iii)
log
8.4787
(iv)
log
0.4787
(v)
log
1.4787
Question
64
64.
log
3
10
15
9
=
(i)
9
log
3
10
18
(ii)
8
log
3
10
15
(iii)
9
log
3
10
15
(iv)
10
log
3
10
15
(v)
log
1
10
12
9
Question
65
65.
log
6
8
67
7
=
(i)
7
log
6
8
67
(ii)
6
log
6
8
67
(iii)
log
4
8
64
7
(iv)
7
log
6
8
69
(v)
8
log
6
8
67
Question
66
66.
log
809
100
50
5
=
(i)
5
log
809
100
50
(ii)
6
log
809
100
50
(iii)
log
807
100
47
5
(iv)
4
log
809
100
50
(v)
5
log
809
100
53
Question
67
67.
log
10
6
25
=
(i)
log
2
+
log
3
−
2
log
3
(ii)
log
2
+
log
3
−
2
log
5
(iii)
log
2
+
2
log
3
−
2
log
5
(iv)
log
2
+
log
2
−
2
log
5
(v)
log
2
+
log
3
−
2
log
8
Assignment Key
1) (iii)
2) (iii)
3) (v)
4) (iii)
5) (i)
6) (ii)
7) (iv)
8) (iii)
9) (iv)
10) (i)
11) (ii)
12) (iii)
13) (v)
14) (ii)
15) (iii)
16) (iv)
17) (v)
18) (iv)
19) (iii)
20) (v)
21) (ii)
22) (ii)
23) (ii)
24) (iv)
25) (ii)
26) (iii)
27) (v)
28) (iii)
29) (ii)
30) (i)
31) (v)
32) (iv)
33) (i)
34) (v)
35) (iii)
36) (v)
37) (iii)
38) (iv)
39) (i)
40) (v)
41) (iii)
42) (v)
43) (v)
44) (i)
45) (iv)
46) (iii)
47) (iv)
48) (v)
49) (i)
50) (v)
51) (v)
52) (iii)
53) (v)
54) (v)
55) (ii)
56) (iv)
57) (iii)
58) (ii)
59) (i)
60) (ii)
61) (i)
62) (ii)
63) (iv)
64) (iii)
65) (i)
66) (i)
67) (ii)
