EduSahara™ Assignment
Name : Arithmetic Progressions Miscellaneous
Chapter : Arthimetic Progressions
Grade : CBSE Grade X
License : Non Commercial Use
Question
1
1.
The
t
19
of an A.P. is
20
and the
t
8
is
9
.
Find
t
10
.
(i)
9
(ii)
13
(iii)
12
(iv)
10
(v)
11
Question
2
2.
The
t
18
of an A.P. is
155
28
and the
t
14
is
127
28
.
Find
t
5
.
(i)
18
7
(ii)
2
(iii)
16
7
(iv)
16
5
(v)
16
9
Question
3
3.
Find the sum of first 78 natural numbers
(i)
3081
(ii)
3083
(iii)
3080
(iv)
3079
(v)
3082
Question
4
4.
Find the next
4
terms of the following A.P.
(
−
5
a
−
2
b
)
,
(
−
6
a
−
10
b
)
,
(
−
7
a
−
18
b
)
,
. . .
(i)
(
−
8
a
−
26
b
)
,
(
−
9
a
−
34
b
)
,
(
−
10
a
−
42
b
)
,
(
−
11
a
−
50
b
)
(ii)
(
−
12
a
−
20
b
)
,
(
−
13
a
−
28
b
)
,
(
−
14
a
−
36
b
)
,
(
−
15
a
−
44
b
)
(iii)
(
−
13
a
−
28
b
)
,
(
−
14
a
−
36
b
)
,
(
−
15
a
−
44
b
)
,
(
−
16
a
−
52
b
)
(iv)
(
−
9
a
−
34
b
)
,
(
−
10
a
−
42
b
)
,
(
−
11
a
−
50
b
)
,
(
−
12
a
−
58
b
)
(v)
(
−
3
a
−
24
b
)
,
(
−
4
a
−
32
b
)
,
(
−
5
a
−
40
b
)
,
(
−
6
a
−
48
b
)
Question
5
5.
Find
t
n
of the A.P
6
,
11
,
16
,
21
,
26
,
. . .
(i)
(
9
n
+
1
)
(ii)
(
5
n
+
1
)
(iii)
(
5
n
+
7
)
(iv)
(
5
n
+
6
)
(v)
(
4
n
+
1
)
Question
6
6.
Find
t
n
of the A.P
2
7
,
15
28
,
11
14
,
29
28
,
9
7
,
. . .
(i)
(
1
4
n
+
2
7
)
(ii)
(
1
4
n
+
9
28
)
(iii)
(
1
4
n
+
1
28
)
(iv)
(
−
15
4
n
+
1
28
)
(v)
(
9
4
n
+
1
28
)
Question
7
7.
The
t
7
of an A.P is
p
and
t
8
is
q
.
Find
t
17
and
t
n
.
(i)
(
−
9
p
+
10
q
)
,
(
−
p
n
+
p
+
q
n
−
q
)
(ii)
(
−
9
p
+
10
q
)
,
(
−
p
n
+
8
p
+
q
n
−
7
q
)
(iii)
(
−
10
p
+
11
q
)
,
(
−
p
n
+
7
p
+
q
n
−
6
q
)
(iv)
(
−
2
p
+
4
q
)
,
(
−
p
n
+
15
p
+
q
n
−
13
q
)
(v)
(
−
8
p
+
9
q
)
,
(
−
p
n
+
8
p
+
q
n
−
7
q
)
Question
8
8.
Determine k so that
(
8
k
+
1
)
,
(
4
k
+
3
)
and
(
3
k
+
2
)
are the consecutive terms of an A.P
(i)
-2
(ii)
1
(iii)
2
(iv)
3
(v)
0
Question
9
9.
The product of two numbers is
22737
and their arithmetic mean is
151
.
Find the two numbers.
(i)
(
143
,
159
)
(ii)
(
161
,
145
)
(iii)
(
144
,
160
)
(iv)
(
145
,
159
)
(v)
(
143
,
158
)
Question
10
10.
Find the sum of all natural numbers between 1 and 100 which are multiples of 7?
(i)
737
(ii)
734
(iii)
735
(iv)
733
(v)
736
Question
11
11.
Find the sum of all natural numbers between 100 and 200 which are multiples of 9?
(i)
1680
(ii)
1685
(iii)
1683
(iv)
1684
(v)
1682
Question
12
12.
Find the sum of the following A.P. series
(
6
x
+
4
y
)
,
(
12
x
+
8
y
)
,
(
18
x
+
12
y
)
. . .
to
5
terms
(i)
(
90
x
+
60
y
)
(ii)
(
66
x
+
44
y
)
(iii)
(
54
x
+
36
y
)
Question
13
13.
Find
t
n
of the A.P
7
,
9
,
11
,
. . .
(i)
(
2
n
+
12
)
(ii)
(
n
+
5
)
(iii)
(
2
n
+
7
)
(iv)
(
2
n
+
5
)
(v)
(
5
n
+
5
)
Question
14
14.
If
S
20
and
S
50
of an A.P. are
1110
and
6525
respectively, then
S
70
=
(i)
12638
(ii)
12636
(iii)
12632
(iv)
12635
Question
15
15.
If x
≠
y and the sequences x ,
a
1
,
a
2
, y and x ,
b
1
,
b
2
, y
each are in A.P., then
a
2
−
a
1
b
2
−
b
1
=
(i)
1
(ii)
3
2
(iii)
(
-3
4
)
(iv)
4
3
(v)
2
3
Question
16
16.
If there are n arithmetic means between a and b, the common difference d =
(i)
(
a
−
b
)
(
n
+
1
)
(ii)
(
n
−
1
)
(
a
+
b
)
(iii)
(
b
−
a
)
(
n
−
1
)
(iv)
(
b
−
a
)
(
n
+
1
)
(v)
(
a
+
b
)
(
n
+
1
)
Question
17
17.
The sum of first n natural number is
(i)
(
n
−
1
)
(
n
+
1
)
2
(ii)
(
n
)
(
n
+
1
)
(
2
n
+
1
)
6
(iii)
n
2
(
n
+
1
)
2
4
(iv)
(
n
)
(
n
+
1
)
2
(v)
(
n
)
(
n
−
1
)
2
Question
18
18.
The measures of the interior angles of a convex polygon are in A.P.
If the smallest angle is
129
and the largest angle is
159
,
then the number of sides of the polygon is
(i)
11
(ii)
12
(iii)
9
(iv)
7
(v)
10
Question
19
19.
If the
t
n
of an A.P is
(
4
n
+
8
)
, find
S
n
(i)
(
2
)
(
n
2
+
n
)
2
+
n
(ii)
(
5
)
(
n
2
+
n
)
2
+
9
n
(iii)
(
4
)
(
n
2
+
n
)
2
+
8
n
(iv)
(
3
)
(
n
2
+
n
)
2
+
n
Question
20
20.
Determine
t
8
and
t
n
of an A.P. whose
t
5
is
37
and
t
10
is
72
.
(i)
57
;
(
7
n
+
9
)
(ii)
59
;
(
7
n
+
11
)
(iii)
60
;
(
8
n
+
2
)
(iv)
56
;
(
6
n
+
2
)
(v)
58
;
(
7
n
+
2
)
Assignment Key
1) (v)
2) (iii)
3) (i)
4) (i)
5) (ii)
6) (iii)
7) (ii)
8) (ii)
9) (i)
10) (iii)
11) (iii)
12) (i)
13) (iv)
14) (iv)
15) (i)
16) (iv)
17) (iv)
18) (v)
19) (iii)
20) (v)
