EduSahara™ Assignment
Name : Simplification
Chapter : Logarithms
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
log
4
+
log
10
=
(i)
log
43
(ii)
log
40
(iii)
log
39
(iv)
log
38
(v)
log
40
2
Question
2
2.
log
99
+
log
64
=
(i)
log
6335
(ii)
log
6336
(iii)
log
6333
(iv)
log
6336
2
(v)
log
6338
Question
3
3.
log
6
8
+
log
6
4
=
(i)
log
6
11
(ii)
log
6
12
(iii)
log
4
12
(iv)
log
6
13
(v)
log
8
12
Question
4
4.
log
36
8
+
log
36
6
=
(i)
log
36
14
(ii)
log
39
14
(iii)
log
36
13
(iv)
log
36
15
(v)
log
33
14
Question
5
5.
log
66
−
log
95
=
(i)
log
22
31
(ii)
log
66
95
(iii)
log
68
95
(iv)
log
2
(
66
95
)
(v)
log
64
95
Question
6
6.
log
52
−
log
65
=
(i)
log
4
5
(ii)
log
2
(
4
5
)
(iii)
log
6
5
(iv)
log
4
3
(v)
log
2
5
Question
7
7.
log
13
−
log
65
=
(i)
log
3
5
(ii)
log
(
-1
5
)
(iii)
log
1
5
(iv)
log
1
3
(v)
log
2
(
1
5
)
Question
8
8.
log
10
63
=
(i)
2
log
3
+
log
5
(ii)
2
log
3
+
log
7
(iii)
2
log
6
+
log
7
(iv)
log
3
+
log
7
(v)
2
log
3
+
2
log
7
Question
9
9.
log
10
810
=
(i)
log
2
+
4
log
3
+
log
5
(ii)
log
2
+
4
log
5
+
log
5
(iii)
log
2
+
4
log
3
+
log
2
(iv)
2
log
2
+
4
log
3
+
log
5
(v)
log
2
+
4
log
3
+
log
4
Question
10
10.
log
5162
=
(i)
log
89
−
log
58
(ii)
log
89
+
log
58
(iii)
log
89
✕
log
58
(iv)
log
89
÷
log
58
(v)
58
log
89
Question
11
11.
log
8
11
=
(i)
log
11
÷
log
8
(ii)
log
8
÷
log
11
(iii)
log
11
−
log
8
(iv)
log
11
+
log
8
(v)
log
11
✕
log
8
Question
12
12.
log
9
67
=
(i)
log
9
90
+
log
67
90
(ii)
log
67
90
÷
log
9
90
(iii)
log
9
90
÷
log
67
90
(iv)
log
9
90
✕
log
67
90
(v)
log
9
90
−
log
67
90
Question
13
13.
log
6
71
=
(i)
log
3
71
✕
log
6
3
(ii)
log
3
71
+
log
6
3
(iii)
log
6
3
÷
log
3
71
(iv)
log
3
71
−
log
6
3
(v)
log
3
71
÷
log
6
3
Question
14
14.
log
9
10
+
log
2
3
=
(i)
log
1
5
(ii)
log
3
5
(iii)
log
2
(
3
5
)
(iv)
log
1
Question
15
15.
log
22
27
+
log
6
7
=
(i)
log
46
63
(ii)
log
2
3
(iii)
log
44
61
(iv)
log
2
(
44
63
)
(v)
log
44
63
Question
16
16.
log
9
5
+
log
9
5
=
(i)
log
9
10
(ii)
log
7
10
(iii)
log
9
11
(iv)
log
9
9
(v)
log
11
10
Question
17
17.
log
93
8
+
log
93
9
=
(i)
log
93
18
(ii)
log
91
17
(iii)
log
93
17
(iv)
log
96
17
(v)
log
93
16
Question
18
18.
log
6.0000
+
log
1.0000
=
(i)
log
5.0000
(ii)
log
6.0000
(iii)
log
8.0000
(iv)
log
4.0000
(v)
log
7.0000
Question
19
19.
log
2.0000
+
log
74.0000
=
(i)
log
147.0000
(ii)
log
150.0000
(iii)
log
148.0000
(iv)
log
146.0000
(v)
log
149.0000
Question
20
20.
log
5
+
log
1
=
(i)
log
8
(ii)
log
5
(iii)
log
5
2
(iv)
log
2
(v)
log
4
Question
21
21.
log
73
+
log
77
=
(i)
log
5621
(ii)
log
5620
(iii)
log
5621
2
(iv)
log
5618
(v)
log
5623
Question
22
22.
log
19
56
+
log
54
65
=
(i)
log
2
(
513
1820
)
(ii)
log
513
1820
(iii)
log
103
364
(iv)
log
57
202
(v)
log
73
260
Question
23
23.
log
72
2
+
log
72
2
=
(i)
log
75
4
(ii)
log
72
3
(iii)
log
72
5
(iv)
log
69
4
(v)
log
72
4
Question
24
24.
log
15
+
log
59
=
(i)
log
884
(ii)
log
885
2
(iii)
log
885
(iv)
log
887
(v)
log
883
Question
25
25.
log
23
34
+
log
10
50
=
(i)
log
5
34
(ii)
log
2
(
23
170
)
(iii)
log
23
168
(iv)
log
21
170
(v)
log
23
170
Question
26
26.
log
7
2
+
log
7
8
=
(i)
log
9
10
(ii)
log
7
9
(iii)
log
7
10
(iv)
log
7
11
(v)
log
4
10
Question
27
27.
log
22.0000
+
log
15.0000
=
(i)
log
332.0000
(ii)
log
328.0000
(iii)
log
330.0000
(iv)
log
331.0000
(v)
log
329.0000
Question
28
28.
log
0.1750
+
log
0.8000
=
(i)
log
7.1400
(ii)
log
1.1400
(iii)
log
0.1400
(iv)
log
8.1400
(v)
log
2.1400
Question
29
29.
log
82
8
+
log
82
9
=
(i)
log
82
18
(ii)
log
79
17
(iii)
log
82
16
(iv)
log
82
17
(v)
log
84
17
Question
30
30.
log
51
55
−
log
43
97
=
(i)
log
4947
2365
(ii)
log
4949
2365
(iii)
log
291
139
(iv)
log
2
(
4947
2365
)
(v)
log
23
11
Question
31
31.
log
10
6
−
log
10
4
=
(i)
log
10
(ii)
log
10
2
(iii)
log
12
2
(iv)
log
8
2
(v)
log
10
3
Question
32
32.
log
51.0000
−
log
2.0000
=
(i)
log
24.5000
(ii)
log
23.5000
(iii)
log
25.5000
(iv)
log
27.5000
(v)
log
26.5000
Question
33
33.
log
34
91
−
log
13
76
=
(i)
log
2584
1181
(ii)
log
2586
1183
(iii)
log
2584
1183
(iv)
log
2
(
2584
1183
)
(v)
log
2582
1183
Question
34
34.
log
19
2
−
log
19
9
=
(i)
log
19
-6
(ii)
log
19
-7
(iii)
log
22
-7
(iv)
log
16
-7
(v)
log
19
-8
Question
35
35.
log
76.2000
−
log
24.0800
=
(i)
log
1.1645
(ii)
log
5.1645
(iii)
log
3.1645
(iv)
log
4.1645
(v)
log
2.1645
Question
36
36.
log
66
98
−
log
10
18
=
(i)
log
59
49
(ii)
log
2
(
297
245
)
(iii)
log
299
245
(iv)
log
297
245
(v)
log
11
9
Question
37
37.
log
32
6
−
log
32
2
=
(i)
log
30
4
(ii)
log
32
5
(iii)
log
34
4
(iv)
log
32
4
(v)
log
32
3
Question
38
38.
log
55.7800
−
log
88.2000
=
(i)
log
8.6324
(ii)
log
1.6324
(iii)
log
7.6324
(iv)
log
2.6324
(v)
log
0.6324
Question
39
39.
log
10
4
−
log
10
7
=
(i)
log
10
-3
(ii)
log
10
-4
(iii)
log
13
-3
(iv)
log
7
-3
(v)
log
10
-2
Question
40
40.
log
4
2
2
=
(i)
log
4
2
(ii)
3
log
4
2
(iii)
2
log
4
4
(iv)
2
log
4
2
(v)
log
2
(-1)
2
Question
41
41.
log
10
16
9
=
(i)
2
log
2
3
(ii)
2
log
2
(iii)
2
log
4
3
(iv)
log
4
3
(v)
3
log
4
3
Question
42
42.
log
10
100
21
=
(i)
log
2
+
2
log
5
−
log
3
−
log
7
(ii)
2
log
2
+
2
log
5
−
log
3
−
log
9
(iii)
3
log
2
+
2
log
5
−
log
3
−
log
7
(iv)
2
log
2
+
2
log
5
−
log
3
−
log
7
(v)
2
log
2
+
2
log
5
−
log
3
−
log
4
Question
43
43.
log
10
162
=
(i)
log
2
+
4
log
1
(ii)
log
4
+
4
log
3
(iii)
log
2
+
4
log
3
(iv)
2
log
2
+
4
log
3
(v)
log
1
+
4
log
3
Question
44
44.
log
10
960
=
(i)
7
log
2
+
log
3
+
log
5
(ii)
6
log
2
+
log
3
+
log
5
(iii)
6
log
2
+
log
2
+
log
5
(iv)
6
log
2
+
log
5
+
log
5
(v)
6
log
2
+
-1
log
3
+
log
5
Question
45
45.
log
120
=
(i)
30
log
4
(ii)
log
4
✕
log
30
(iii)
log
4
+
log
30
(iv)
log
4
÷
log
30
(v)
log
4
−
log
30
Question
46
46.
log
81
74
=
(i)
74
log
81
(ii)
log
81
÷
log
74
(iii)
log
81
✕
log
74
(iv)
log
81
+
log
74
(v)
log
81
−
log
74
Question
47
47.
log
10
33
35
=
(i)
log
33
35
−
log
10
(ii)
log
33
35
÷
log
10
(iii)
log
33
35
✕
log
10
(iv)
log
10
÷
log
33
35
(v)
log
33
35
+
log
10
Question
48
48.
log
10
47
=
(i)
log
47
✕
log
10
(ii)
log
47
+
log
10
(iii)
log
47
−
log
10
(iv)
log
10
÷
log
47
(v)
log
47
÷
log
10
Question
49
49.
log
4.09
87.7000
=
(i)
log
87.7000
−
log
4.09
(ii)
log
87.7000
+
log
4.09
(iii)
log
87.7000
✕
log
4.09
(iv)
log
4.09
÷
log
87.7000
(v)
log
87.7000
÷
log
4.09
Question
50
50.
log
1
2
17
45
=
(i)
log
17
45
÷
log
1
2
(ii)
log
17
45
−
log
1
2
(iii)
log
17
45
+
log
1
2
(iv)
log
1
2
÷
log
17
45
(v)
log
17
45
✕
log
1
2
Question
51
51.
log
4
3
15
3
=
(i)
3
log
4
÷
3
log
15
(ii)
3
log
15
+
3
log
4
(iii)
3
log
15
÷
3
log
4
(iv)
3
log
15
−
3
log
4
(v)
3
log
15
✕
3
log
4
Question
52
52.
log
2
5
63
6
=
(i)
6
5
log
2
63
(ii)
12
5
log
2
63
(iii)
6
5
log
2
66
(iv)
6
5
log
2
-1
60
(v)
6
5
log
2
62
Question
53
53.
log
3
36
=
(i)
log
3
18
✕
log
36
18
(ii)
log
3
18
÷
log
36
18
(iii)
log
3
18
+
log
36
18
(iv)
log
36
18
÷
log
3
18
(v)
log
3
18
−
log
36
18
Question
54
54.
log
7
34
=
(i)
log
7
5
÷
log
5
34
(ii)
log
5
34
−
log
7
5
(iii)
log
5
34
✕
log
7
5
(iv)
log
5
34
+
log
7
5
(v)
log
5
34
÷
log
7
5
Question
55
55.
log
17
17
17
14
=
(i)
0.8235
(ii)
2.8235
(iii)
7.8235
(iv)
1.8235
(v)
8.8235
Question
56
56.
log
1.9100
+
log
67.4200
=
(i)
log
126.7722
(ii)
log
128.7722
(iii)
log
129.7722
(iv)
log
130.7722
(v)
log
127.7722
Question
57
57.
log
85.8700
+
log
1.7100
=
(i)
log
146.8377
(ii)
log
148.8377
(iii)
log
144.8377
(iv)
log
147.8377
(v)
log
145.8377
Question
58
58.
log
91
2
+
log
91
4
=
(i)
log
93
6
(ii)
log
91
7
(iii)
log
91
5
(iv)
log
91
6
(v)
log
89
6
Question
59
59.
log
71.3100
+
log
26.5700
=
(i)
log
1894.7068
(ii)
log
1896.7068
(iii)
log
1893.7068
(iv)
log
1892.7068
(v)
log
1895.7068
Question
60
60.
log
100
−
log
70
=
(i)
log
12
7
(ii)
log
2
(iii)
log
2
(
10
7
)
(iv)
log
8
7
(v)
log
10
7
Question
61
61.
log
41
50
−
log
2
11
=
(i)
log
451
98
(ii)
log
449
100
(iii)
log
451
100
(iv)
log
453
100
(v)
log
2
(
451
100
)
Question
62
62.
log
27
10
−
log
27
10
=
(i)
log
1
(ii)
log
27
3
(iii)
log
27
-2
(iv)
log
27
(v)
log
27
-1
Question
63
63.
log
38.3200
−
log
76.6200
=
(i)
log
8.5001
(ii)
log
1.5001
(iii)
log
2.5001
(iv)
log
0.5001
(v)
log
7.5001
Question
64
64.
log
4
5
97
7
=
(i)
7
log
4
5
97
(ii)
8
log
4
5
97
(iii)
log
2
5
94
7
(iv)
7
log
4
5
99
(v)
6
log
4
5
97
Question
65
65.
log
2
7
43
3
=
(i)
3
log
2
7
45
(ii)
3
log
2
7
43
(iii)
4
log
2
7
43
(iv)
2
log
2
7
43
(v)
log
2
5
41
3
Question
66
66.
log
1009
100
56
9
=
(i)
log
1007
100
53
9
(ii)
9
log
1009
100
59
(iii)
9
log
1009
100
56
(iv)
10
log
1009
100
56
(v)
8
log
1009
100
56
Question
67
67.
log
10
14
27
=
(i)
log
2
+
2
log
7
−
3
log
3
(ii)
log
2
+
log
7
−
3
log
1
(iii)
log
2
+
log
6
−
3
log
3
(iv)
log
2
+
log
7
−
3
log
3
(v)
log
2
+
log
7
−
3
log
5
Assignment Key
1) (ii)
2) (ii)
3) (ii)
4) (i)
5) (ii)
6) (i)
7) (iii)
8) (ii)
9) (i)
10) (ii)
11) (i)
12) (iii)
13) (i)
14) (ii)
15) (v)
16) (i)
17) (iii)
18) (ii)
19) (iii)
20) (ii)
21) (i)
22) (ii)
23) (v)
24) (iii)
25) (v)
26) (iii)
27) (iii)
28) (iii)
29) (iv)
30) (i)
31) (ii)
32) (iii)
33) (iii)
34) (ii)
35) (iii)
36) (iv)
37) (iv)
38) (v)
39) (i)
40) (iv)
41) (iii)
42) (iv)
43) (iii)
44) (ii)
45) (iii)
46) (v)
47) (ii)
48) (v)
49) (v)
50) (i)
51) (iii)
52) (i)
53) (ii)
54) (iii)
55) (i)
56) (ii)
57) (i)
58) (iv)
59) (i)
60) (v)
61) (iii)
62) (i)
63) (iv)
64) (i)
65) (ii)
66) (iii)
67) (iv)
