Arithmetic progression - Jamb Mathematics Past Questions and Answers

Question 11:

• JAMB 1991

Find the sum of the first 20 terms in an arithmetic progression whose first term is 7 and last term is 117.

A. 2480
B. 1240
C. 620
D. 124

Question 12:

• JAMB 1992

For an arithmetical sequence, the first term is 2 and the common difference is 3. Find the sum of the first 11 terms

A. 157
B. 187
C. 197
D. 200

Question 13:

• 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 14:

• 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 15:

• JAMB 1998

If p + 1, 2P - 10, 1 - 4p²are three consecutive terms of an arithmetic progression, find the possible values of p

A. -4, 2
B. -3, \(\frac{4}{11}\)
C. -\(\frac{4}{11}\), 2
D. 5, -3