Test: Arithmetic Series I - Normal

Double click on maths expressions to zoom
Question 1:   The initial term of an arithmetic progression is   a 1 =3   and difference   d=0.3  .  Find   a 11 .
6.3
6
0
5.7
Question 2:   Arithmetic progression is given by formula   a n =10n   .  Find   a 4 .
6
14
2,5
5
Question 3:   Find the difference   d   of an arithmetic series if   a 1 =6, a 8 =50 .
8
8
7
7
Question 4:   Find the initial term of an arithmetic series   a n  ,  if   a 15 =20   and the common difference   d=0.5 .
13
12.5
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 =2n1
a n =2n5
a n =2n5
a n =52n
Question 6:   Find the second term of the arithmetic sequence   a n   if first and third ones are   8   and   14   respectively.
3
3
1 3
11
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
30
54
78
Question 8:   Find the sum of the first   10   terms if an arithmetic sequence   a n   if   a 1 =3   and difference   d=4 .
15
150
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).
150
225
460
300
Question 10:   The arithmetic series   a n   is given by formula of the nth term   a n =4n1  .  Find the sum of the first eighteen terms.
612
639
666
1332