Progression - Jamb Mathematics Past Questions and Answers

Question 31:

• JAMB 1993

If k + 1; 2k - 1, 3k + 1 are three consecutive terms of a geometric progression, find the possible values of the common ratio

A. 0, 8
B. -1, \(\frac{5}{3}\)
C. 2, 3
D. 1, -1

Question 32:

• 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 33:

• JAMB 1994

If the 6th term of an arithmetic progression is 11 and the first term is 1, find the common difference.

A. \(\frac{12}{5}\)
B. \(\frac{5}{3}\)
C. -2
D. 2

Question 34:

• JAMB 1994

Find the nth term of the sequence 3, 6, 10, 15, 21.....

A. \(\frac{n(n - 1)}{2}\)
B. \(\frac{n(n + 1)}{2}\)
C. \(\frac{(n + 1)(n + 2)}{2}\)
D. N(2n + 1)

Question 35:

• 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