Arithmetic progression - Jamb Mathematics Past Questions and Answers

Question 6:

• JAMB 1978

An arithmetic progression has first term 11 and fourth term 32. The sum of the first nine terms is

A. 351
B. 531
C. 135
D. 153

Question 7:

• JAMB 1981

The first term of an Arithmetic progression is 3 and the fifth term is 9. Find the number of terms in the progression if the sum is 81

A. 12
B. 27
C. 9
D. 4
E. 36

Question 8:

• JAMB 1988

If the sum of the 8th and 9th terms of an arithmetic progression is 72 and the 4th term is -6, find the common difference

A. 4
B. 8
C. 6\(\frac{2}{3}\)
D. 9\(\frac{1}{3}\)

Question 9:

• JAMB 1989

If -8, m, n, 19 are in arithmetic progression, find (m, n)

A. 1, 10
B. 2, 10
C. 3, 13
D. 4, 16

Question 10:

• JAMB 1990

Find the sum of the first twenty terms of the progression log a, log a², log a³.....

A. Log a²⁰
B. Log a²¹
C. Log a²⁰⁰
D. Log a²¹⁰