Approximations - Jamb Mathematics Past Questions and Answers

Question 6:

• JAMB 2016

If a car travels 120km on 45 litres of petrol, how much petrol is needed for a journey of 600km?

A. 720 litres
B. 160 litres
C. 225 litres
D. 960 litres

Question 7:

• JAMB 1981

Evaluate \(\frac{6.3 \times 10^5}{8.1 \times 10^3}\) to 3 significant fiqures

A. 77.80
B. 778.0
C. 7.870
D. 8.770
E. 88.70

Question 8:

• JAMB 1982

Express 37.05 x 0.0042 in standard form

A. 15.561 x 10²
B. 1.5561 x 10^-4
C. 1.556 x 10^-1
D. 1.5561 x 10¹
E. 1.55 x 10¹

Question 9:

• JAMB 1985

Arrange the following numbers in ascending order of magnitude \(\frac{6}{7}\), \(\frac{13}{15}\), 0.8650

A. \(\frac{6}{7}\) < 0.865 < \(\frac{13}{15}\)
B. \(\frac{13}{15}\) < \(\frac{6}{7}\) < 0.865
C. \(\frac{6}{7}\) < \(\frac{13}{15}\) < 0.865
D. 0.865 < \(\frac{6}{7}\) < \(\frac{13}{15}\)

Question 10:

• JAMB 1986

Evaluate (212)₃ - (121)₃ + (222)₃

A. (313)₃
B. (1000)₃
C. (1020)₃
D. (1222)₃