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Jamb Mathematics 1989 Past Questions and Answers

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Jamb 1989 Mathematics Past Questions

Question 26:


Simplify \(\frac{x(x + 1)^{\frac{1}{2}} - (x + 1)^{\frac{1}{2}}}{(x + 1)^{\frac{1}{2}}}\)

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


Question 27:


The sum of the first two terms of a geometric progression is x and sum of the last terms is y. If there are n terms in all, then the common ratio is

A. \(\frac{x}{y}\)
B. \(\frac{y}{x}\)
C. (\(\frac{x}{y}\))\(\frac{1}{n - 2}\)
D. (\(\frac{y}{x}\))\(\frac{1}{n - 2}\)


Question 28:


If -8, m, n, 19 are in arithmetic progression, find (m, n)

A. 1, 10
B. 2, 10
C. 3, 13
D. 4, 16


Question 29:


A regular polygon of (2k + 1) sides has 140° as the size of each interior angle. Find k

A. 4
B. 4\(\frac{1}{2}\)
C. 8
D. 8\(\frac{1}{2}\)


Question 30:


PQRS is a rhombus. If PR\(^2\) + QS\(^2\) = kPQ\(^2\), determine k.

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






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