ALGEBRA - Jamb Mathematics Past Questions and Answers

Question 116:

• JAMB 1979

12 men complete a job in 9 days. How many men working t the same rate would be required to complete the job in 6 days?

A. 24
B. 18
C. 12
D. 9
E. 8

Question 117:

• JAMB 1979

Simplify \(\frac{1 - x^2}{x - x^2}\), where x \(\neq\) 0

A. \(\frac{1}{x}\)
B. \(\frac{1 - x}{x}\)
C. \(\frac{1 + x}{x}\)
D. \(\frac{1}{x - 1}\)
E. \(\frac{-x - 1}{1}\)

Question 118:

• JAMB 1979

The size of a quantity first doubles and then increases by a further 16%. After a short time its size decreases by 16%. What is the net increases in size of the quantity?

A. \(\frac{59300}{625}\)
B. \(\frac{50900}{625}\)
C. 200%
D. +100%

Question 119:

• JAMB 1979

If y = x² - 2x - 3, Find the least value of y and corresponding value of x

A. X = 3, y = 3
B. X = 1, y = -3
C. X = 4, y = 1
D. X = 1, y = -4
E. X = 2, y = -3

Question 120:

• JAMB 1979

A father is now three times as old as his son. Twelve years ago he was six times as old as his son. How old are the son and the father?

A. 20 and 45
B. 100 and 150
C. 45 and 65
D. 35 and 75
E. 20 and 60