Arithmetic progression - Jamb Mathematics Past Questions and Answers

Question 21:

• JAMB 2004

Given that the first and forth terms of G.P are 6 and 162 respectively, find the sum of the first three terms of the progression

A. 27
B. 8
C. 78
D. 48

Question 22:

• JAMB 2004

The nth term of two sequences are Q_n = 3 . 2^{n - 2} and U_m = 3 . 2^{2m - 3}. Find the product of Q₂ and U₂.

A. 18
B. 12
C. 6
D. 3

Question 23:

• JAMB 2005

If the 7th term of an AP is twice the third term and the sum of the first four terms is 42, find the common difference.

A. 6
B. 3
C. 2
D. 1

Question 24:

• JAMB 2006

The sum of the first n positive integers is

A. ¹/₂ n(n-1)
B. N(n+1)
C. N(n-1)
D. ¹/₂ n(n+1)

Question 25:

• JAMB 2008

The fifth term of an A.P is 24 and the eleventh term is 96. Find the first term.

A. 12
B. 4
C. -12
D. -24