EduSahara™ Assignment
Name : Simplification
Chapter : Logarithms
Grade : ICSE Grade IX
License : Non Commercial Use
Question
1
1.
log
2
+
log
7
=
(i)
log
13
(ii)
log
14
2
(iii)
log
16
(iv)
log
12
(v)
log
14
Question
2
2.
log
28
+
log
35
=
(i)
log
980
(ii)
log
983
(iii)
log
979
(iv)
log
980
2
(v)
log
977
Question
3
3.
log
2
8
+
log
2
6
=
(i)
log
2
15
(ii)
log
2
14
(iii)
log
2
13
(iv)
log
4
14
(v)
log
(-1)
14
Question
4
4.
log
31
10
+
log
31
9
=
(i)
log
34
19
(ii)
log
31
20
(iii)
log
31
18
(iv)
log
28
19
(v)
log
31
19
Question
5
5.
log
54
−
log
99
=
(i)
log
4
11
(ii)
log
6
11
(iii)
log
2
(
6
11
)
(iv)
log
2
3
(v)
log
8
11
Question
6
6.
log
61
−
log
40
=
(i)
log
61
38
(ii)
log
61
40
(iii)
log
59
40
(iv)
log
63
40
(v)
log
2
(
61
40
)
Question
7
7.
log
45
−
log
60
=
(i)
log
3
4
(ii)
log
2
(
3
4
)
(iii)
log
3
2
(iv)
log
5
4
(v)
log
1
4
Question
8
8.
log
10
210
=
(i)
log
2
+
log
5
+
log
5
+
log
7
(ii)
log
2
+
log
3
+
log
5
+
log
4
(iii)
log
2
+
log
3
+
log
5
+
2
log
7
(iv)
log
2
+
log
3
+
log
5
+
log
6
(v)
log
2
+
log
3
+
log
5
+
log
7
Question
9
9.
log
10
1260
=
(i)
2
log
2
+
2
log
3
+
log
5
+
log
5
(ii)
2
log
2
+
2
log
3
+
log
5
+
log
7
(iii)
2
log
2
+
2
log
3
+
log
5
+
2
log
7
(iv)
2
log
5
+
2
log
3
+
log
5
+
log
7
(v)
2
log
2
+
2
log
3
+
log
4
+
log
7
Question
10
10.
log
4512
=
(i)
log
94
✕
log
48
(ii)
log
94
÷
log
48
(iii)
log
94
−
log
48
(iv)
48
log
94
(v)
log
94
+
log
48
Question
11
11.
log
5
11
=
(i)
log
11
−
log
5
(ii)
log
5
÷
log
11
(iii)
log
11
✕
log
5
(iv)
log
11
÷
log
5
(v)
log
11
+
log
5
Question
12
12.
log
10
64
=
(i)
log
64
3
÷
log
10
3
(ii)
log
10
3
✕
log
64
3
(iii)
log
10
3
+
log
64
3
(iv)
log
10
3
÷
log
64
3
(v)
log
10
3
−
log
64
3
Question
13
13.
log
6
30
=
(i)
log
10
30
✕
log
6
10
(ii)
log
10
30
+
log
6
10
(iii)
log
10
30
÷
log
6
10
(iv)
log
6
10
÷
log
10
30
(v)
log
10
30
−
log
6
10
Question
14
14.
log
2
3
+
log
4
9
=
(i)
log
8
27
(ii)
log
2
9
(iii)
log
8
25
(iv)
log
2
(
8
27
)
(v)
log
10
27
Question
15
15.
log
6
35
+
log
14
41
=
(i)
log
12
203
(ii)
log
12
205
(iii)
log
2
(
12
205
)
(iv)
log
2
41
(v)
log
14
205
Question
16
16.
log
5
6
+
log
5
5
=
(i)
log
5
12
(ii)
log
7
11
(iii)
log
3
11
(iv)
log
5
11
(v)
log
5
10
Question
17
17.
log
58
3
+
log
58
7
=
(i)
log
58
11
(ii)
log
60
10
(iii)
log
55
10
(iv)
log
58
10
(v)
log
58
9
Question
18
18.
log
10.0000
+
log
10.0000
=
(i)
log
10.0000
(ii)
log
8.0000
(iii)
log
9.0000
(iv)
log
11.0000
(v)
log
12.0000
Question
19
19.
log
64.0000
+
log
46.0000
=
(i)
log
2943.0000
(ii)
log
2942.0000
(iii)
log
2945.0000
(iv)
log
2944.0000
(v)
log
2946.0000
Question
20
20.
log
7
+
log
6
=
(i)
log
45
(ii)
log
41
(iii)
log
42
2
(iv)
log
40
(v)
log
42
Question
21
21.
log
77
+
log
43
=
(i)
log
3314
(ii)
log
3311
2
(iii)
log
3308
(iv)
log
3310
(v)
log
3311
Question
22
22.
log
1
26
+
log
43
94
=
(i)
log
41
2444
(ii)
log
2
(
43
2444
)
(iii)
log
43
2442
(iv)
log
43
2444
(v)
log
45
2444
Question
23
23.
log
88
5
+
log
88
3
=
(i)
log
88
7
(ii)
log
90
8
(iii)
log
88
8
(iv)
log
88
9
(v)
log
86
8
Question
24
24.
log
23
+
log
55
=
(i)
log
1264
(ii)
log
1267
(iii)
log
1263
(iv)
log
1265
2
(v)
log
1265
Question
25
25.
log
3
44
+
log
24
96
=
(i)
log
1
176
(ii)
log
1
58
(iii)
log
2
(
3
176
)
(iv)
log
3
176
(v)
log
5
176
Question
26
26.
log
55
2
+
log
55
5
=
(i)
log
55
7
(ii)
log
58
7
(iii)
log
53
7
(iv)
log
55
8
(v)
log
55
6
Question
27
27.
log
9.0000
+
log
95.0000
=
(i)
log
854.0000
(ii)
log
856.0000
(iii)
log
853.0000
(iv)
log
857.0000
(v)
log
855.0000
Question
28
28.
log
0.4590
+
log
0.2500
=
(i)
log
1.1148
(ii)
log
7.1148
(iii)
log
8.1148
(iv)
log
2.1148
(v)
log
0.1148
Question
29
29.
log
60
10
+
log
60
2
=
(i)
log
60
11
(ii)
log
58
12
(iii)
log
60
13
(iv)
log
62
12
(v)
log
60
12
Question
30
30.
log
31
89
−
log
1
2
=
(i)
log
64
89
(ii)
log
62
87
(iii)
log
62
89
(iv)
log
60
89
(v)
log
2
(
62
89
)
Question
31
31.
log
4
4
−
log
4
4
=
(i)
log
1
(ii)
log
4
-3
(iii)
log
4
2
(iv)
log
4
-1
(v)
log
4
Question
32
32.
log
32.0000
−
log
41.0000
=
(i)
log
8.7805
(ii)
log
1.7805
(iii)
log
0.7805
(iv)
log
7.7805
(v)
log
2.7805
Question
33
33.
log
7
25
−
log
1
2
=
(i)
log
12
25
(ii)
log
14
25
(iii)
log
16
25
(iv)
log
14
23
(v)
log
2
(
14
25
)
Question
34
34.
log
15
6
−
log
15
8
=
(i)
log
15
-1
(ii)
log
12
-2
(iii)
log
15
-3
(iv)
log
17
-2
(v)
log
15
-2
Question
35
35.
log
4.3400
−
log
56.4800
=
(i)
log
0.0768
(ii)
log
1.0768
(iii)
log
2.0768
(iv)
log
8.0768
(v)
log
7.0768
Question
36
36.
log
18
80
−
log
3
11
=
(i)
log
2
(
33
40
)
(ii)
log
33
40
(iii)
log
7
8
(iv)
log
31
40
(v)
log
33
38
Question
37
37.
log
18
9
−
log
18
2
=
(i)
log
18
6
(ii)
log
18
7
(iii)
log
16
7
(iv)
log
21
7
(v)
log
18
8
Question
38
38.
log
53.6200
−
log
81.2600
=
(i)
log
1.6599
(ii)
log
7.6599
(iii)
log
2.6599
(iv)
log
8.6599
(v)
log
0.6599
Question
39
39.
log
64
2
−
log
64
2
=
(i)
log
64
-1
(ii)
log
1
(iii)
log
64
2
(iv)
log
64
-2
(v)
log
64
Question
40
40.
log
4
45
3
=
(i)
3
log
4
45
(ii)
2
log
4
45
(iii)
4
log
4
45
(iv)
3
log
4
48
(v)
log
2
43
3
Question
41
41.
log
10
8
5
=
(i)
3
log
2
−
log
3
(ii)
3
log
2
−
log
5
(iii)
4
log
2
−
log
5
(iv)
2
log
2
−
log
5
(v)
3
log
2
−
log
8
Question
42
42.
log
10
175
16
=
(i)
2
log
5
+
2
log
7
−
4
log
2
(ii)
2
log
5
+
log
7
−
4
log
4
(iii)
2
log
5
+
log
7
−
4
log
2
(iv)
2
log
5
+
log
7
−
log
2
(v)
2
log
5
+
log
6
−
4
log
2
Question
43
43.
log
10
120
=
(i)
3
log
2
+
log
3
+
log
5
(ii)
3
log
5
+
log
3
+
log
5
(iii)
3
log
2
+
log
3
+
2
log
5
(iv)
3
log
2
+
log
1
+
log
5
(v)
3
log
2
+
log
3
+
log
4
Question
44
44.
log
10
840
=
(i)
3
log
2
+
log
3
+
2
log
5
+
log
7
(ii)
3
log
4
+
log
3
+
log
5
+
log
7
(iii)
3
log
2
+
log
3
+
log
5
+
log
7
(iv)
3
log
2
+
log
1
+
log
5
+
log
7
(v)
2
log
2
+
log
3
+
log
5
+
log
7
Question
45
45.
log
4929
=
(i)
log
93
÷
log
53
(ii)
log
93
+
log
53
(iii)
log
93
−
log
53
(iv)
53
log
93
(v)
log
93
✕
log
53
Question
46
46.
log
81
30
=
(i)
log
81
−
log
30
(ii)
log
81
÷
log
30
(iii)
log
81
+
log
30
(iv)
log
81
✕
log
30
(v)
30
log
81
Question
47
47.
log
2
21
43
=
(i)
log
21
43
÷
log
2
(ii)
log
21
43
−
log
2
(iii)
log
21
43
+
log
2
(iv)
log
2
÷
log
21
43
(v)
log
21
43
✕
log
2
Question
48
48.
log
2
42
=
(i)
log
42
÷
log
2
(ii)
log
42
−
log
2
(iii)
log
42
✕
log
2
(iv)
log
2
÷
log
42
(v)
log
42
+
log
2
Question
49
49.
log
6.07
10.1200
=
(i)
log
10.1200
✕
log
6.07
(ii)
log
6.07
÷
log
10.1200
(iii)
log
10.1200
÷
log
6.07
(iv)
log
10.1200
+
log
6.07
(v)
log
10.1200
−
log
6.07
Question
50
50.
log
1
2
7
12
=
(i)
log
7
12
+
log
1
2
(ii)
log
7
12
−
log
1
2
(iii)
log
7
12
✕
log
1
2
(iv)
log
1
2
÷
log
7
12
(v)
log
7
12
÷
log
1
2
Question
51
51.
log
5
4
8
2
=
(i)
4
log
5
÷
2
log
8
(ii)
2
log
8
÷
4
log
5
(iii)
2
log
8
✕
4
log
5
(iv)
2
log
8
−
4
log
5
(v)
2
log
8
+
4
log
5
Question
52
52.
log
4
4
60
3
=
(i)
3
2
log
4
60
(ii)
3
4
log
4
63
(iii)
3
4
log
1
58
(iv)
3
4
log
4
59
(v)
3
4
log
4
60
Question
53
53.
log
6
15
=
(i)
log
15
100
÷
log
6
100
(ii)
log
6
100
✕
log
15
100
(iii)
log
6
100
+
log
15
100
(iv)
log
6
100
−
log
15
100
(v)
log
6
100
÷
log
15
100
Question
54
54.
log
4
53
=
(i)
log
4
10
÷
log
10
53
(ii)
log
10
53
✕
log
4
10
(iii)
log
10
53
−
log
4
10
(iv)
log
10
53
+
log
4
10
(v)
log
10
53
÷
log
4
10
Question
55
55.
log
11
9
11
25
=
(i)
0.7778
(ii)
3.7778
(iii)
2.7778
(iv)
1.7778
(v)
4.7778
Question
56
56.
log
38.3300
+
log
3.7400
=
(i)
log
144.3542
(ii)
log
143.3542
(iii)
log
142.3542
(iv)
log
141.3542
(v)
log
145.3542
Question
57
57.
log
56.8600
+
log
28.4300
=
(i)
log
1617.5298
(ii)
log
1618.5298
(iii)
log
1616.5298
(iv)
log
1614.5298
(v)
log
1615.5298
Question
58
58.
log
41
5
+
log
41
6
=
(i)
log
41
10
(ii)
log
43
11
(iii)
log
38
11
(iv)
log
41
12
(v)
log
41
11
Question
59
59.
log
43.6800
+
log
39.9400
=
(i)
log
1742.5792
(ii)
log
1744.5792
(iii)
log
1746.5792
(iv)
log
1745.5792
(v)
log
1743.5792
Question
60
60.
log
33
−
log
16
=
(i)
log
33
14
(ii)
log
33
16
(iii)
log
35
16
(iv)
log
31
16
(v)
log
2
(
33
16
)
Question
61
61.
log
23
29
−
log
16
47
=
(i)
log
1081
462
(ii)
log
1079
464
(iii)
log
1083
464
(iv)
log
2
(
1081
464
)
(v)
log
1081
464
Question
62
62.
log
90
10
−
log
90
9
=
(i)
log
89
(ii)
log
90
2
(iii)
log
90
(iv)
log
87
(v)
log
92
Question
63
63.
log
54.5400
−
log
30.8800
=
(i)
log
9.7662
(ii)
log
2.7662
(iii)
log
0.7662
(iv)
log
1.7662
(v)
log
3.7662
Question
64
64.
log
4
8
81
2
=
(i)
log
1
4
78
2
(ii)
2
log
4
8
83
(iii)
log
4
8
81
(iv)
2
log
4
8
81
(v)
3
log
4
8
81
Question
65
65.
log
2
5
9
5
=
(i)
4
log
2
5
9
(ii)
log
(-1)
5
6
5
(iii)
6
log
2
5
9
(iv)
5
log
2
5
9
(v)
5
log
2
5
12
Question
66
66.
log
226
25
15
5
=
(i)
5
log
226
25
17
(ii)
4
log
226
25
15
(iii)
log
224
25
13
5
(iv)
5
log
226
25
15
(v)
6
log
226
25
15
Question
67
67.
log
10
30
7
=
(i)
log
2
+
log
3
+
log
5
−
log
4
(ii)
log
2
+
2
log
3
+
log
5
−
log
7
(iii)
log
2
+
log
2
+
log
5
−
log
7
(iv)
log
2
+
log
3
+
log
5
−
log
7
(v)
log
2
+
log
3
+
log
5
−
log
10
Assignment Key
1) (v)
2) (i)
3) (ii)
4) (v)
5) (ii)
6) (ii)
7) (i)
8) (v)
9) (ii)
10) (v)
11) (iv)
12) (iv)
13) (i)
14) (i)
15) (ii)
16) (iv)
17) (iv)
18) (i)
19) (iv)
20) (v)
21) (v)
22) (iv)
23) (iii)
24) (v)
25) (iv)
26) (i)
27) (v)
28) (v)
29) (v)
30) (iii)
31) (i)
32) (iii)
33) (ii)
34) (v)
35) (i)
36) (ii)
37) (ii)
38) (v)
39) (ii)
40) (i)
41) (ii)
42) (iii)
43) (i)
44) (iii)
45) (ii)
46) (i)
47) (i)
48) (i)
49) (iii)
50) (v)
51) (ii)
52) (v)
53) (v)
54) (ii)
55) (iii)
56) (ii)
57) (iii)
58) (v)
59) (ii)
60) (ii)
61) (v)
62) (iii)
63) (iv)
64) (iv)
65) (iv)
66) (iv)
67) (iv)
