JAMB - Mathematics (2000)

1
Let P = {1, 2, u, v, w, x}; Q = {2, 3, u, v, w, 5, 6, y} and R = {2, 3, 4, v, x, y}.

Determine (P-Q) ∩ R
คำตอบ
(C)
{x}
2
If the population of a town was 240,000 in January 1998 and it increased by 2% each year, what would be the population of the town in January, 2000?
คำตอบ
(B)
249,696
3
If \(\frac{(2\sqrt{3}-\sqrt{2})}{(\sqrt{3}+2\sqrt{2})} = m +n\sqrt{6}\), find the values of m and n respectively.
คำตอบ
(B)
-2, 1
4
In a youth club with 94 members, 60 like modern music, and 50 like traditional music. The number of members who like both traditional and modern music is three times those who do not like any type of music. How many members like only one type of music?
คำตอบ
(C)
62
5
Evaluate \(\frac{(2.813 \times 10^{-3} \times 1.063)}{(5.637 \times 10^{-2})}\) reducing each number to two significant figures and leaving your answer in two significant figures.
คำตอบ
(B)
0.055
6
A man wishes to keep his money in a savings deposit at 25% compound interest so that after three years he can buy a car for N150,000. How much does he need to deposit?
คำตอบ
(D)
N76,800.00
7
If 314\(_{10}\) - 256\(_7\) = 340\(_x\), find x.
คำตอบ
(A)
7
8
Simplify \(\frac{3(2^{n+1}) - 4(2^{n-1})}{2^{n+1} - 2^n}\)
คำตอบ
(C)
4
9
If \(P344_{6} - 23P2_{6} = 2PP2_{6}\), find the value of the digit P.
คำตอบ
(D)
5
10
A binary operation * is defined by a * b = a\(^b\). If a * 2 = 2 - a, find the possible values of a.
คำตอบ
(D)
1, -2
11
The 3rd term of an A.P is 4x - 2y and the 9th term is 10x - 8y. Find the common difference.
คำตอบ
(C)
x - y
12
Find the inverse of p under the binary operation * defined by p*q = p + q - pq, where p and q are real numbers and zero is the identity
คำตอบ
(C)
p/(p-1)
13
Evaluate (\(\frac{1}{2} - \frac{1}{4} + \frac{1}{8} - \frac{1}{16} + ...) -1\)
คำตอบ
(C)
-2/3
14
if (x - 1), (x + 1) and (x - 2) are factors of the polynomial ax\(^3\) + bx\(^2\) + cx - 1, find a, b, c in that order.
คำตอบ
(A)
-1/2, 1., 1/2
15
A trader realizes 10x - x\(^2\) naira profit from the sale of x bags on corn. How many bags will give him the desired profit?
คำตอบ
(B)
5
16
Solve the inequality 2 - x > x\(^2\).
คำตอบ
(D)
-2 < x < 1
17
If α and β are the roots of the equation 3x\(^2\) + 5x - 2 = 0, find the value of 1/α + 1/β
คำตอบ
(D)
5/2
18
A frustrum of pyramid with square base has its upper and lower sections as squares of sizes 2m and 5m respectively and the distance between them 6m. Find the height of the pyramid from which the frustrum was obtained.
คำตอบ
(D)
10.0 m
19
P is a point on one side of the straight line UV and P moves in the same direction as UV. If the straight line ST is on the locus of P and angle VUS = 50°, find angle UST.
คำตอบ
(B)
130°
20
An equilateral triangle of side √3cm is inscribed in a circle. Find the radius of the circle.
คำตอบ
(C)
1 cm
21
3y = 4x - 1 and Ky = x + 3 are equations of two straight lines. If the two lines are perpendicular to each other, find K.
คำตอบ
(A)
-\(\frac{4}{3}\)
22
if P and Q are fixed points and X is a point which moves so that XP = XQ, the locus of X is
คำตอบ
(D)
the perpendicular bisector of PQ
23
In a regular polygon, each interior angle doubles its corresponding exterior angle. Find the number of sides of the polygon.
คำตอบ
(B)
6
24
A predator moves in a circle of radius √2 centre (0,0), while a prey moves along the line y = x. If 0 \(\leq\) x \(\leq\) 2, at which point(s) will they meet?
คำตอบ
(A)
(1,1) only
25
Find the value of \(\int^{\pi}_{0}\frac{cos^{2}\theta-1}{sin^{2}\theta}d\theta\)
คำตอบ
(D)
-π
26
If y = 2xcos2x - sin2x, find \(\frac{dy}{dx}\) when x = \(\frac{π}{4}\)
คำตอบ
(B)
-π
27
A bowl is designed by revolving completely the area enclosed by y = x2 - 1, y = 3 and x ≥ 0 around the y-axis. What is the volume of this bowl?
คำตอบ
(B)
15π/2 cubic units
28
If the volume of a hemisphere is increasing at a steady rate of 18π m\(^{3}\) s\(^{-1}\), at what rate is its radius changing when its is 6m?
คำตอบ
(C)
0.25 m/s
29
X and Y are two events. The probability of X or Y is 0.7 and that of X is 0.4. If X and Y are independent, find the probability of Y.
คำตอบ
(A)
0.30
30
If the mean of the numbers 0, (x+2), (3x+6), and (4x+8) is 4, find their mean deviation.
คำตอบ
(C)
3
31
In how many ways can the word MATHEMATICS be arranged?
คำตอบ
(C)
11!/(2! 2! 2!)
32
Given that the various faces of a fair dice 1, 2, 3, 4, 5, 6 appeared 30, 43, 54, 40, 41, 32 times respectively in a single toss. Picture the figures as being represented in a simple table with number (X) against frequency (f).

If a pie chart is used to depict the data, the angle corresponding to 4 is?
คำตอบ
(D)
60°
33
If U = {x : x is an integer and 1 \(\leq\) x \(\leq\) 20}
E1 = {x : x is a multiple of 3}
E2 = {x : x is a multiple of 4}
and an integer is picked at random from U, find the probability that it is not in E2
คำตอบ
(A)
3/4
34
The variance of x, 2x, 3x, 4x and 5x is
คำตอบ
(B)
2x²
35
Find the sum of the range and the mode of the set of numbers 10, 9, 10, 9, 8, 7, 7, 10, 8, 10, 8, 4, 6, 9, 10, 9, 10, 9, 7, 10, 6, 5
คำตอบ
(A)
16
36
In how many ways can a delegation of 3 be chosen from among 5 men and 3 women, if at least one man and at least one woman must be included?
คำตอบ
(D)
45
37
A function f(x) passes through the origin and its first derivative is 3x + 2. What is f(x)?
คำตอบ
(A)
y = \(\frac{3x^2}{2}\) + 2x
38
The expression ax2 + bx + c equals 5 at x = 1. If its derivative is 2x + 1, what are the values of a, b, c respectively?
คำตอบ
(D)
1, 1, 3
39
Evaluate 5^-3log₅2 x 2^2log₂3
คำตอบ
(B)
1¹/₈
40
In the diagram above, if ∠RPS = 50^o, ∠RPQ = 30^o and PQ = QR, find the value of ∠PRS.
คำตอบ
(B)
70^o
41
In the diagram, EFGH is a circle centre O. FH is a diameter and GE is a chord which meets FH at right angle at the point N. If NH = 8cm and EG = 24cm, calculate FH
คำตอบ
(B)
26cm
42
If the diagram is the graph of y = x\(^2\), the shaded area is
คำตอบ
(B)
\(\frac{128}{3}\) square units
43
The cumulative frequency curve represents the ages of ages of students in a school. What age group do 70% of the students belongs?
คำตอบ
(A)
17.5 - 20.5
44
Audu bought an article for N50,000 and sold it to Femi at a loss of x%. Femi later sold the article to Oche at a profit of 40%. If Femi made a profit of N10,000, find the value of x.
คำตอบ
(B)
50
45
A ship sails a distance of 50km in the direction S50ºE and then sails in the distance of 50km in the direction N40ºE. Find the bearing of the ship from its original position.
คำตอบ
(A)
S90\(^0\)E