Test: Arithmetic Series I - Normal

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Question 1:   The initial term of an arithmetic progression is   a 1 =3   and difference   d=0.3  .  Find   a 11 .
5.7
6
0
6.3
Question 2:   Arithmetic progression is given by formula   a n =10−n   .  Find   a 4 .
5
2,5
14
6
Question 3:   Find the difference   d   of an arithmetic series if   a 1 =6,   a 8 =−50 .
−7
−8
8
7
Question 4:   Find the initial term of an arithmetic series   a n  ,  if   a 15 =20   and the common difference   d=0.5 .
12.5
−13
12.5
13
Question 5:   Find the formula of the nth term of an arithmetic series   a n :   −3, −5, −7, −9 ...   (-3 is the initial term).
a n =−2n−5
a n =−2n−1
a n =2n−5
a n =5−2n
Question 6:   Find the second term of the arithmetic sequence   a n   if first and third ones are   −8   and   14   respectively.
−11
−3
3
1 3
Question 7:   What is the sum of the first six terms of an arithmetic sequence   a n   if   a 1 =8,   a 7 =18 ?
156
54
78
−30
Question 8:   Find the sum of the first   10   terms if an arithmetic sequence   a n   if   a 1 =−3   and difference   d=4 .
150
15
170
165
Question 9:   Find the sum of the first twenty terms of an arithmetic series   a n : −4, −2, 0...   (-4 is the initial term).
225
300
−460
150
Question 10:   The arithmetic series   a n   is given by formula of the nth term   a n =4n−1  .  Find the sum of the first eighteen terms.
666
639
1332
−612