WAEC - Mathematics (2024)

1
Multiply 3.4 x 10$^{-5}$ by 7.1 x 10$^8$ and leave the answer in standard form.
Răspuns
(C)
2.414 x 10$^4$
2
Given that P = {p: 1< p < 20}, where p is an integer and R = {r : 0 $\leq$ r $\leq$ 25, where r is a multiple of 4}. Find P ∩ R
Răspuns
(B)
{4, 8, 12, 16}
3
The first term of an Arithmetic Progression (A.P) is 2 and the last term is 29. If the common difference is 3, how many terms are in the A.P.?
Răspuns
(C)
10
4
Express in index form: log$_a^x$ + log$_a^y$ = 3
Răspuns
(C)
xy = a$^3$
5
Simplify: (2p - q)$^2$ - (p + q)$^2$
Răspuns
(A)
3p(p - 2q)
6
If (3 - 4$\sqrt{2}$)(1 + 3$\sqrt{2}$) = a + b$\sqrt{2}$, find the value of b
Răspuns
(B)
5
7
Find the sum for which $ 1,250.00 will amount to $ 2,031.25 at 12.5% per annum simple interest.
Răspuns
(D)
5 years
8
If log$_3^{2x - 1}$ = 5, find the value of x
Răspuns
(D)
122
9
The population of a town increases by 3% every year. In the year 2000, the population was 3000. Find the population in the year 2003.
Răspuns
(B)
3,278
10
A trader gave a change of # 540.00 instead of # 570.00 to a customer. Caculate the percentage error.
Răspuns
(A)
5$\frac{5}{19}$%
11
The interior angle of a regular polygon is 168º. Find the number of sides of the polygon.
Răspuns
(B)
30
12
If 3x - 2y = - 5 and x + 2y = 9, find the value of $\frac{x - y}{x + y}$
Răspuns
(C)
$\frac{-3}{5}$
13
A variable W varies partly as M and Partly inversely as P. Which of the following correctly represents the relation with k$_1$ and k$_2$ constants?
Răspuns
(C)
W = k$_1$M + $\frac{k_2}{P}$
14
A cylindrical metallic barrel of height 2.5m and radius 0.245 is closed at one end. Find, correct to one decimal place, the total surface area of the barrel (Take π = $\frac{22}{7}$)
Răspuns
(C)
4.0 m$^2$
15
Make R the subject of the relation V = πl(R$^2$ - r$^2$)
Răspuns
(A)
R = $\sqrt{\frac{V}{πl} + r^2}$
16
Consider the following statements:

m = Edna is respectful

n = Edna is brilliant,

If m ⇒ n, which of the following is valid?
Răspuns
(A)
¬n ⇒ ¬m.
17
A number is added to both the numerator and the denominator of the fraction $\frac{1}{8}$ if the result is $\frac{1}{2}$, find the number.
Răspuns
(D)
6
18
Gifty, Justina, and Frank shared 60 oranges in the ratio 5: 3: 7 respectively. How many oranges did Justina receive?
Răspuns
(B)
12
19
Find the quadratic equation whose roots are $\frac{2}{3}$ and - 1
Răspuns
(C)
3x$^2$ + x - 2 = 0
20
A piece of rod of length 44 m is cut to form a rectangular shape such that the ratio of the length to the breadth is 7: 4. Find the breath.
Răspuns
(A)
8m
21

In the diagram above, $\overline{MN} || \overline{KL}$, $\overline{ML}$ and $\overline{KN}$ intersect at X. |$\overline{MN}$| = 12cm, |$\overline{MX}$| = 10cm and |$\overline{MN}$| = 9cm. If the area of $\triangle$ MXN is 16cm$^2$, calculate the area of $\triangle$ LXK
Răspuns
(A)
9cm$^2$
22
A ladder 15 m long leans against a vertical pole, making an angle of 72º with the horizontal. Calculate, correct to one decimal place, the distance between the foot of the ladder and the pole.
Răspuns
(D)
4.6 m
23

In the diagram above, O is the centre of the circle. If | $\overline{OA}$ = 25 cm and |$\overline{AB}$ = 40 cm, find |$\overline{OH}$|
Răspuns
(A)
15 cm
24
A car valued at $ 600,000.00 depreciates by 10% each year. What will be the value of the car at the end of two years?
Răspuns
(C)
$ 486,000.00
25
Given that P is 25 m on a bearing of 330º from Q, how far south of P is Q?
Răspuns
(B)
21.7 m
26
The length and breadth of a cuboid are 15 cm and 8 cm respectively. If the volume of the cuboid is 1560 cm$^3$, calculate the total surface area.
Răspuns
(B)
838cm$^2$
27
The number 1621 was subtracted from 6244 in base x. If the result was 4323, find x.
Răspuns
(A)
Seven
28
Factorize completely: 27x$^2$ - 48y$^2$
Răspuns
(A)
3(3x + 4y)(3x - 4y)
29
For what values of x is $\frac{x - 3}{4}$ + $\frac{x + 1}{8}$ $\geq$ 2 ?
Răspuns
(C)
x $\geq$ 7
30

In the diagram above, < SQR = 52º and < PRT = 16º. Find the value of the angle marked y
Răspuns
(C)
112$^0$
31

In the diagram above, JKL is a tangent to the circle GHIK at K.
Răspuns
(B)
55º
32
A cone and a cylinder are of equal volume. The base radius of the cone is twice the radius of the cylinder. What is the ratio of the height of the cylinder to that of the cone?
Răspuns
(B)
4: 3
33

Find, correct to the nearest whole number, the value of h in the diagram above.
Răspuns
(C)
23 m
34
The gradient of the line joining the points P(2, -8) and Q(1, y) is -4. Find the value of y
Răspuns
(C)
-4
35

In the diagram above, $\overline{PQ}$ || $\overline{RS}$, $\angle$WYZ = 44º and $\angle$WXY = 50º. Find $\angle$WTX
Răspuns
(C)
86º
36
The perimeter of a rectangular garden is 90 m. If the width is 7 m less than the length, find the length of the garden.
Răspuns
(D)
26 m
37
Four of the angles of a hexagon sum up to 420º. If the remaining angles are equal, find the value of each of the angles.
Răspuns
(D)
150$^O$
38

Find the value of x in the diagram above.
Răspuns
(A)
120º
39
The following are the masses (in kg) of members in a club: 59, 44, 53, 49, 57, 40, 48, and 50. Calculate the mean mass.
Răspuns
(B)
50 kg
40
The following are the masses (in kg) of members in a club: 59, 44, 53, 49, 57, 40, 48, and 50. Calculate the variance of the distribution.
Răspuns
(A)
35
41
Two opposite sides of a rectangle are (5x + 3) m and (2x + 9) m. If an adjacent side is (6x - 7) m, find in m$^2$, the area of the rectangle.
Răspuns
(B)
65
42
A die is tossed once. Find the probability of getting a prime number.
Răspuns
(A)
$\frac{1}{2}$
43
The area of a sector of a circle with radius 7cm is 51.3 cm$^2$. Calculate, correct to the nearest whole number, the angle of the sector. (Take $\pi$ = $\frac{22}{7}$)
Răspuns
(B)
120$^0$
44
A cliff on the bank of a river 87 m high. A boat on the river is 22 m away from the cliff. Calculate, correct to the nearest degree, the angle of depression of the boat from the top of the cliff.
Răspuns
(A)
76$^o$
45

In the diagram $\overline{TU}$ is a tangent to the circle SPQR at P. If $\angle$PTS = 44º, $\angle$SQP = 35º, find $\angle$PST
Răspuns
(A)
101º