Fractions Decimals Approximations And Percentages - Mathematics Jamb Past Questions and Answers

Question 256 :

• JAMB 2015

Simplify \( \frac{1}{(x + 1)} + \frac{1}{(x − 1)} \)

A. 2x/(x + 1)(x−3)
B. 2/(x + 1)(x−1)
C. 2x/(x + 1)2
D. 2x(x+1)2

Question 257 :

• JAMB 2015

Simplify √30 x √40

A. 10 √3
B. 5 √3
C. 20 √3
D. 15 √3

Question 258 :

• JAMB 2015

If duty is levied at 25%, find the duty to be added to a bill of N80.

A. N100
B. N20
C. N80
D. N150

Question 259 :

• JAMB 2015

Simplify 2.04 x 3.7 (Leave your answer in 2 decimal place)

A. 7.51
B. 7.71
C. 5.5
D. 7.55

Question 260 :

• JAMB 2015

A public car dealer marked up the cost of a car at 30% in an attempt to make 20% gross profit. Due to the value of dollar, he now placed 20% discount on the car. What profit or loss will he make?

A. 3%
B. 2%
C. 4%
D. 1%