Waec Mathematics 2005 Past Questions and Answers

Question 46:

• WAEC 2005

The monthly salary of a man increased from N2,700 to N3,200. Find the percentage increase

A. 10%
B. 15%
C. 15.6%
D. 18.5%

Question 47:

• WAEC 2005

In the diagram, O is the center of the circle, ∠MON = 80^o, ∠LMO = 10^o and ∠LNO = 15^o. Calculate the value of x

A. 40^o
B. 50^o
C. 55^o
D. 75^o

Question 48:

• WAEC 2005

The figure shows a quadrilateral PQRS having equal sides and opposite sides parallel. The diagonals PR and QS intersect perpendicularly at O, Which of the following statements cannot be correct

A. |PO|=|RO|
B. PQR is an equilateral triangle
C. PQRX is a parallelogram
D. There are two lines of symmetry

Question 49:

• WAEC 2005

(a) Evaluate without using the mathematical table or calculator, \(\log_{10} \sqrt{30} - \log_{10} \sqrt{6} + \log_{10} \sqrt{2}\).
(b)
\(U = {1, 2, 3, ..., 10} ; A = {1, 2, 3, 4, 5} ; B = {2, 3, 5}\) and \(C = {6, 8, 10}\). (i) Given that the Venn diagram represents the sets above, copy and fill in the elements.
(ii) Find \(A \cap C\) ; (iii) Find \(A \cap B'\).

Question 50:

• WAEC 2005

(a) Evaluate : \(2 \div (\frac{64}{125})^{-\frac{2}{3}}\)
(b) The lines \(y = 3x + 5\) and \(y = - 4x - 1\) intersect at a point k. Find the coordinates of k.