Mathematics 2018 Past Questions | WAEC
Study the following Mathematics past questions and answers for JAMB, WAEC NECO and Post-JAMB. Get prepared with official past questions and answers for upcoming examinations.
31.
In the diagram, which of the following ratios is equal to \(\frac{|PN|}{|PQ|}\)?
- A.\(\frac{|PN|}{|PR|}\)
- B. \(\frac{|PM|}{|PQ|}\)
- C. \(\frac{|PM|}{|PR|}\)
- D. \(\frac{|PR|}{|PQ|}\)
Correct Option: Answer is C
32. If P and Q are two statements, under what condition would p|q be false?
- A. If p is true and q is true
- B. If p is true and q is false
- C. If p is false and q is false
- D. If p is false and q is true
Correct Option: Answer is B
33. Find the median of 2, 1, 0, 3, 1, 1, 4, 0, 1 and 2
- A. 0.0
- B. 0.5
- C. 1.0
- D. 1.5
Correct Option: Answer is C
34. Find the mean deviation of 20, 30, 25, 40, 35, 50, 45, 40, 20 and 45
- A. 8
- B. 9
- C. 10
- D. 1
Correct Option: Answer is B
Σfx = 350
Σf = 50
Mean = \(\frac{\sum f x}{\sum f}\)
= \(\frac{350}{10}\)
= 35
= \(\frac{\sum f |d|}{\sum f}\)
= \(\frac{90}{10}\)
= 9
35.
Find the value of t in the diagram
- A. 63º
- B. 117º
- C. 126º
- D. 234º
Correct Option: Answer is C
α = 180º – 177° (angles on a straight line)
= 63º
t = 2 x 63º (angle at centre = 2 x angle at circumference)
= 126º
36.
In the diagram, PR is a tangent to the circle at Q, QT//RS,
- A. 40
- B. 65
- C. 85
- D. 95
Correct Option: Answer is D
In the diagram,
a = 50º (alternate angles)
b1 + a 35o = 180o (sum of angles on a straight line)
i.e; b1 + 50o + 35o
= 180
b1 + 180º – 85º = 90º
But b2 = b1 = 95º(angles in alternate segment)
37.
In the diagram, WXYZ is a rectangle with dimension 8cm by 6cm. P, Q, R and S are the midpoints of the sides of the rectangle as shown. Using this information, what type of quadrilateral is the shaded region?
- A. Trapezium
- B. Prism
- C. Rectangle
- D. Rhombus
Correct Option: Answer is D
38.
In the diagram, PS and RS are tangents to the circle centre O,
- A. 110
- B. 135
- C. 165
- D. 225
Correct Option: Answer is C
Thus, m = 2 x 55º (is a bisector of obtuse
m = 110º
n = 1/2 x 110º (angle at centre = 2 x angle at circumference)
n = 55º
= 165o
39.
In the diagram, WXYZ is a rectangle with diamension 8cm by 6cm. P, Q, R and S are the midpoints of the rectangle as shown. Using this information calculate the area of the part of the rectangle that is not shaded
- A. 25cm
- B. 24cm
- C. 16cm
- D. 12cm
Correct Option: Answer is B
40. The solution of x + 2 2x + 1 is illustrated
- A. i
- B. ii
- C. iii
- D. iv