Surds - Jamb Mathematics Past Questions and Answers

Question 16:

• JAMB 1980

Find, correct to three significant figures, the value of \(\sqrt{41830}\).

A. 205
B. 647
C. 2050
D. 6470
E. 64.7

Question 17:

• JAMB 1980

Find, correct to three significant figures, the value of \(\sqrt{41830}\).

A. 205
B. 647
C. 2050
D. 6470
E. 64.7

Question 18:

• JAMB 1980

Rationalize the denominator of the given expression \(\frac{\sqrt{1 + a} - \sqrt{a}}{1 + a + \sqrt{a}}\)

A. 1 + 2a - 2\(\sqrt{a(1 + a)}\)
B. \(\sqrt{1(1 + a)}\)
C. 2a - 2\(\sqrt{a(1 + a)}\)
D. 1 + 2a - 2\(\sqrt{a + b}\)

Question 19:

• JAMB 1980

Find the product of (2\(\sqrt{y - 3y}\)) and (3y = 2y)

A. 4y = y²
B. 4y + 9y²
C. 4y - 9y²
D. -4y - 9y²
E. 2y + y²

Question 20:

• JAMB 1981

Simplify \(\frac{\sqrt{2}}{\sqrt{3} - \sqrt{2}}\) - \(\frac{3 - 2}{\sqrt{3} + \sqrt{2}}\)

A. 2\(\sqrt{2} - \sqrt{3}\)
B. 3(\(\sqrt{6}\) - 1)
C. \(\sqrt{6}\) - 3
D. -\(\frac{1}{2}\)
E. \(\frac{-\sqrt{3}}{\sqrt{2} - \sqrt{2}}\)