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Class VI
Class VII
Class VIII
Class IX
Class X
CBSE Grade X - Arthimetic Progressions
Question
1
1.
Given a =
6
, d =
4
, n =
17
, find
S
n
647
644
649
645
646
Question
2
2.
The
t
5
of an A.P. is
18
and the
t
7
is
26
.
Find
t
15
.
59
60
58
57
55
Question
3
3.
If a =
6
and d =
1
, find
t
9
of the A.P.
16
11
14
15
13
Question
4
4.
Given a =
3
, d =
5
, n =
16
, find
t
n
81
79
78
77
76
Question
5
5.
The sum of first three terms of an A.P. is
147
20
while their product is
23373
1600
.
Find the A.P.
9
4
,
49
20
,
53
20
,
. . .
9
4
,
41
20
,
37
20
,
. . .
3
2
,
17
10
,
19
10
,
. . .
11
4
,
59
20
,
63
20
,
. . .
9
4
,
31
12
,
35
12
,
. . .
Question
6
6.
Which term of the A.P.
7
,
13
,
19
,
. . .
is
91
?
t
15
t
17
t
12
t
16
t
14
Question
7
7.
Given
t
n
=
68
, a =
5
, n =
10
, find
S
n
368
364
366
362
365
Question
8
8.
Find the sum of all natural numbers between 1 and 100 which are multiples of 4?
1200
1202
1198
1199
1201
Question
9
9.
Determine
t
19
of an A.P whose
t
10
is
68
and common difference is
7
134
128
130
132
131
Question
10
10.
The first term of the A.P.
3
,
4
,
5
,
6
,
7
,
. . .
=
3
5
4
7
6
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