Geometric Progression - Mathematics Jamb Past Questions and Answers

Question 16 :

• JAMB 1993

A man's initial salary is N540.00 a month and increases after each period of six months by N36.00 a month. Find his salary in the eighth month of the third year

A. N828.00
B. N756.00
C. N720.00
D. N684.00

Question 17 :

• JAMB 1995

The 4th term of an A.P. is 13 while the 10th term is 31. Find the 21st term.

A. 175
B. 85
C. 64
D. 45

Question 18 :

• JAMB 1998

The sum of the first three terms of a geometric progression is half its sum to infinity. Find the positive common ratio of the progression.

A. \(\frac{1}{4}\)
B. \(\sqrt{\frac{3}{2}}\)
C. \(\frac{1}{\sqrt{3}}\)
D. \(\frac{1}{\sqrt{2}}\)

Question 19 :

• JAMB 1999

The first term of a geometric progression is twice its common ratio. Find the sum of the first two terms of the G.P if its sum to infinity is 8.

A. 8/5
B. 8/3
C. 72/25
D. 56/9

Question 20 :

• JAMB 2002

The sum to infinity of the series: 1 + (1/3) + (1/9) + (1/27) + ... is

A. 11/3
B. 10/3
C. 5/2
D. 3/2