Waec Mathematics Past Questions and Answers

Question 621:

• WAEC 1999

In the diagram, POR is a circle with center O. ∠QPR = 50°, ∠PQO = 30° and ∠ORP = m. Find m.

A. 20^o
B. 25^o
C. 30^o
D. 50^o

Question 622:

• WAEC 1999

Given that m = -3 and n = 2 find the value of \(\frac{3n^2 - 2m^3}{m}\)

A. -22
B. -14
C. 14
D. 22

Question 623:

• WAEC 1999

Simplify \(\frac{2-18m^2}{1+3m}\)

A. \(2(1+3m)\)
B. \(2(1+3m^2)\)
C. \(2(1-3m)\)
D. \(2(1-3m^2)\)

Question 624:

• WAEC 1999

If \(y = \sqrt{ax-b}\) express x in terms of y, a and b

A. \(x = \frac{y^2-b}{a}\)
B. \(x = \frac{y+b}{a}\)
C. \(x = \frac{y-b}{a}\)
D. \(x = \frac{y^2 + b}{a}\)

Question 625:

• WAEC 1999

Given that \(81\times 2^{2n-2} = K, find \sqrt{K}\)

A. \(4.5\times 2^{n}\)
B. \(4.5\times 2^{2n}\)
C. \(9\times 2^{n-1}\)
D. \(9\times 2^{2n}\)