Progression - Jamb Mathematics Past Questions and Answers

Question 16:

• 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 17:

• JAMB 1980

Which of the formula below represents the general terms of the following set of numbers(-1, \(\frac{2}{3}\), -\(\frac{1}{2}\), \(\frac{2}{5}\)......) for n = 1, 2, 3, 4.......?

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

Question 18:

• 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 19:

• JAMB 1987

Find the eleventh term of the progression 4, 8, 16.....

A. 2¹³
B. 2¹²
C. 2¹¹
D. 2¹⁰

Question 20:

• 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\(\frac{1}{3}\)