Waec Mathematics Past Questions and Answers

Question 1346:

• WAEC 2010

(a) Copy and complete the table of values for the relation \(y = -x^{2} + x + 2; -3 \leq x \leq 3\).

x	-3	-2	-1	0	1	2	3
y		-4		2			-4

(b) Using scales of 2 cm to 1 unit on the x- axis and 2 cm to 2 units on the y- axis, draw a graph of the relation \(y = -x^{2} + x + 2\).
(c) From the graph, find the : (i) minimum value of y ; (ii) roots of equation \(x^{2} - x - 2 = 0\) ; (iii) gradient of the curve at x = -0.5.

Question 1347:

• WAEC 2010

(a)
In the diagram, < PTQ = < PSR = 90°, /PQ/ = 10 cm, /PS/ = 14.4 cm and /TQ/ = 6 cm. Calculate the area of the quadrilateral QRST.
(b) Two opposite sides of a square are each decreased by 10% while the other two are each increased by 15% to form a rectangle. Find the ratio of the area of the rectangle to that of the square.

Question 1348:

• WAEC 2010

The frequency distribution of the weight of 100 participants in a high jump competition is as shown below :

Weight (kg)	20 - 29	30 - 39	40 - 49	50 - 59	60 - 69	70 - 79
Number of Participants	10	18	22	25	16	9

(a) Construct the cumulative frequency table.
(b) Draw the cumulative frequency curve.
(c) From the curve, estimate the : (i) median ; (ii) semi- interquartile range ; (iii) probability that a participant chosen at random weighs at least 60 kg.

Question 1349:

• WAEC 2011

If N112.00 exchanges for D14.95, calculate the value of D1.00 in naira

A. 0.13
B. 7.49
C. 8.00
D. 13.00

Question 1350:

• WAEC 2011

If N112.00 exchanges for D14.95, calculate the value of D1.00 in naira

A. 0.13
B. 7.49
C. 8.00
D. 13.00