NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 206:

• JAMB 1982

Rationalize the expression \(\frac{1}{\sqrt{2} + \sqrt{5}}\)

A. \(\frac{1}{3}\)(\(\sqrt{5} - \sqrt{2}\)
B. \(\frac{\sqrt{2}}{3}\) + \(\frac{\sqrt{5}}{5}\)
C. \(\sqrt{2} - \sqrt{5}\)
D. 5(\(\sqrt{2} - \sqrt{5}\)
E. \(\frac{1}{3}\)(\(\sqrt{2} - \sqrt{5}\)

Question 207:

• JAMB 1982

Rationalize the expression \(\frac{1}{\sqrt{2} + \sqrt{5}}\)

A. \(\frac{1}{3}\)(\(\sqrt{5} - \sqrt{2}\)
B. \(\frac{\sqrt{2}}{3}\) + \(\frac{\sqrt{5}}{5}\)
C. \(\sqrt{2} - \sqrt{5}\)
D. 5(\(\sqrt{2} - \sqrt{5}\)
E. \(\frac{1}{3}\)(\(\sqrt{2} - \sqrt{5}\)

Question 208:

• JAMB 1982

Simplify 3 - 2 \(\div\) \(\frac{4}{5}\) + \(\frac{1}{2}\)

A. 1\(\frac{3}{4}\)
B. -1
C. 1\(\frac{3}{10}\)
D. 1
E. 1\(\frac{9}{10}\)

Question 209:

• JAMB 1982

If N560.70 is shared in the ratio 7 : 2 : 1, what is the smallest share?

A. N392.49
B. N56.70
C. N113.40
D. N112.14
E. N56.07

Question 210:

• JAMB 1982

Write the equation 2 log2x - x log2(1 + y) = 3 in a form not involving logarithms

A. 2^x(1 + y) = 3
B. 2^x - x(1 + y) = 8
C. X² = 8(1 + y)^x
D. X² - x(1 + y) = 8
E. X² - (1 + y)² = 8