WAEC - Mathematics (1990)

1
Simplify 125\(^{\frac{-1}{3}}\) x 49\(^{\frac{-1}{2}}\) x 10\(^0\)
Відповідь
(C)
1/35
2
If 3\(^{2x}\) = 27, what is x?
Відповідь
(B)
1.5
3
Express 0.00562 in standard form
Відповідь
(A)
5.62 x 10^-3
4
Given that 1/3log₁₀ P = 1, find the value of P
Відповідь
(E)
1000
5
Simplify \(\frac{\log \sqrt{8}}{\log 8}\)
Відповідь
(B)
1/2
6
Evaluate using the logarithm table, log(0.65)²
Відповідь
(D)
3.6258
7
If log x = \(\bar{2}.3675\) and log y = 0.9750, what is the value of x + y? Correct to three significant figures
Відповідь
(E)
9.46
8
While doing his physics practical, Idowu recorded a reading as 1.12cm instead of 1.21cm. Calculate his percentage error
Відповідь
(C)
7.44%
9
Find the 4th term of an A.P, whose first term is 2 and the common difference is 0.5
Відповідь
(C)
3.5
10

From the graph determine the roots of the equation y = 2x\(^2\) + x - 6
Відповідь
(C)
-2, 1.5
11

Find the values of x for which y = 5
Відповідь
(B)
-2.6, 2.1
12
An arc of length 22cm subtends an angle of θ at the center of the circle. What is the value of θ if the radius of the circle is 15cm?[Take π = 22/7]
Відповідь
(B)
84^o
13
Find the sum of the first five terms of the G.P 2,6, 18 ....
Відповідь
(C)
242
14
Let J be the set of positive integers, If H = {x: x∈J, x\(^2\) < 3 and x ≠ 0}, then
Відповідь
(A)
H = {1}
15
In a class of 80 students, every students had to study economics or geography, or both economics and geography, if 65 students studied economics and 50 studied geography, how many studied both subjects?
Відповідь
(C)
35
16
The area shaded with horizontal lines is the solution set of the inequalities;
Відповідь
(B)
y ≤ x, y + 2x ≥ -3, x ≤ 3
17

the area shaded with vertical lines is the solution set of the inequalities;
Відповідь
(C)
y ≤ x, y ≤ 2x - 3, x ≤ 3
18

In the diagram above, O is the center of the circle with radius 10cm, and ∠ABC = 30°. Calculate, correct to 1 decimal place, the length of arc AC [Take π = 22/7]
Відповідь
(B)
10.5cm
19
Factorize x\(^2\) + 4x - 192
Відповідь
(C)
(x-12) (x+16)
20
Factorize 2e\(^2\) - 3e + 1
Відповідь
(A)
(2e-1) (e-1)
21
Solve the equation 7y\(^2\) = 3y
Відповідь
(C)
y = 0 or 3/7
22
Find the value of m which makes x\(^2\) + 8 + m a perfect square
Відповідь
(E)
16
23
Solve the equation 2a\(^2\) - 3a - 27 = 0
Відповідь
(E)
-3, 9/2
24
A sector of a circle of radius 7cm has an area of 44cm². Calculate the angle of the sector correct to the nearest degree [Take π = 22/7]
Відповідь
(D)
103^o
25
calculate the surface area of a sphere of radius 7cm [Take π = 22/7]
Відповідь
(C)
616cm²
26
If the radius of the parallel of latitude 30°N is equal to the radius of the parallel of latitude θ°S, what is the value of θ?
Відповідь
(D)
30^o
27
A cylindrical container closed at both ends, has a radius of 7cm and height 5cm [Take π = 22/7]
Find the total surface area of the container
Відповідь
(D)
528cm²
28
A cylindrical container closed at both ends, has a radius of 7cm and height 5cm [Take π = 22/7]. What is the volume of the container?
Відповідь
(E)
770cm³
29

In the diagram above, |PQ| = |PR| = |RS| and ∠RPS = 32°. Find the value of ∠QPR
Відповідь
(C)
52^o
30

In the diagram above, WXYZ is a rhombus and ∠WYX = 20°. What is the value of ∠XZY
Відповідь
(E)
70^o
31

In the diagram above PS||RQ, |RQ| = 6.4cm and perpendicular PH = 3.2cm. Find the area of SQR
Відповідь
(C)
10.24cm²
32

Which angle is equal to ∠VWZ?
Відповідь
(A)
∠VXZ
33

Which triangle is equal in area to ΔVWZ
Відповідь
(B)
ΔVYZ
34
In the diagram above, PQRS s a cyclic quadrilateral, ∠PSR = 86^o and ∠QPR = 38^o. Calculate PRQ
Відповідь
(C)
48^o
35
In the diagram below, O is the center of the circle if ∠QOR = 290^o, find the size ∠QPR
Відповідь
(D)
35^o
36

In the diagram above, PQ is a tangent at T to the circle ABT. ABC is a straight line and TC bisects ∠BTO. Find x.
Відповідь
(E)
50^o
37
Which of the sketches above gives a correct method for constructed an angle of 120^o at the point P?
Відповідь
(D)
I and II only
38
Use mathematical table to evaluate (cos40° - sin30°)
Відповідь
(D)
0.2660
39
If the shadow of a pole 7m high is 1/2 its length what is the angle of elevation of the sun, correct to the nearest degree?
Відповідь
(B)
63^o
40
From the top of a building 10m high, the angle of depression of a stone lying on the horizontal ground is 69^o. Calculate ,correct to one decimal place, the distance of the stone from the foot of the building
Відповідь
(B)
3.8m
41
The bearing of a point X from a point Y is 074°. What is the bearing of Y from X?
Відповідь
(D)
254^o
42

The annual salary of Mr. Johnson Mohammed for 1989 was N12,000.00. He spent this on agriculture projects, education of his children, food items, saving , maintenance and miscellaneous items as shown in the pie chart

How much money did he invest in agriculture?
Відповідь
(E)
N4,000.00
43

The table shows that the amount of money (in naira)collected through voluntary donations in a secondary school. What is the mode?
Відповідь
(D)
N12
44

The table shows that the amount of money (in naira)collected through voluntary donations in a secondary school.
What is the median of distribution
Відповідь
(C)
N12.00
45
Two groups of male students cast their votes on a particular proposal. The result are as follows:

In favor Against

Group A 128 32

Group B 96 48

If a student in favor of the proposal is selected for a post, what is the probability that he is from group A?
Відповідь
(A)
8/19

	In favor	Against
Group A	128	32
Group B	96	48