if P = {x:x is odd, \(-1 < x \leq 20\)} and Q is {y:y is prime, \(-2 < y \leq 25\), find P \(\cap\) Q
คำตอบ
(C)
{3,5,7,11,13,17,19}
9
If S = \(\sqrt{t^2 - 4t + 4}\), find t in terms of S
คำตอบ
(B)
S + 2
10
If x - 4 is a factor of x2 - x - k, then k is
คำตอบ
(B)
12
11
The remainder when 6p3 - p2 - 47p + 30 is divided by p - 3 is
คำตอบ
(B)
42
12
P varies jointly as m and u, and varies inversely as q. Given that p = 4, m = 3 and u = 2 and q = 1, find the value of p when m = 6, u = 4 and q =\(\frac{8}{5}\)
คำตอบ
(C)
10
13
If r varies inversely as the square root of s and t, how does s vary with r and t?
คำตอบ
(B)
s varies inverely as r2 and t
14
Evaluate 3(x + 2) > 6(x + 3)
คำตอบ
(C)
x < -4
15
Solve for x: |x - 2| < 3
คำตอบ
(C)
-1 < x < 5
16
The nth term of the progression \(\frac{4}{2}\), \(\frac{7}{3}\), \(\frac{10}{4}\), \(\frac{13}{5}\) is ...
คำตอบ
(B)
\(\frac{3n + 1}{n + 1}\)
17
If a binary operation * is defined by x * y = x + 2y, find 2 * (3 * 4)
คำตอบ
(A)
24
18
If P = \(\begin{pmatrix} 5 & 3 \\ 2 & 1 \end{pmatrix}\) and Q = \(\begin{pmatrix} 4 & 2 \\ 3 & 5 \end{pmatrix}\), find 2P + Q
If y = x sin x, find \(\frac{\delta y}{\delta x}\)
คำตอบ
(D)
sin x + x cos x
21
If y = (2x + 2)\(^3\), find \(\frac{\delta y}{\delta x}\)
คำตอบ
(D)
6(2x +2)2
22
The radius of a circle is increasing at the rate of 0.02cms-1. Find the rate at which the area is increasing when the radius of the circle is 7cm.
คำตอบ
(D)
0.88cm2S-1
23
Find the mean of t + 2, 2t - 4, 3t + 2 and 2t.
คำตอบ
(B)
2t
24
The mean of seven numbers is 10. If six of the numbers are 2, 4, 8, 14, 16 and 18, find the mode.
คำตอบ
(B)
8
25
Age
20
25
30
35
40
45
No of people
3
5
1
1
2
3
Calculate the median age of the frequency distribution in the table above
คำตอบ
(A)
25
26
If the variance of 3+x, 6, 4, x and 7-x is 4 and the mean is 5, find the standard deviation
คำตอบ
(B)
2
27
\(\begin{array}{c|c} Score & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline Frequency & 1 & 0 & 7 & 5 & 2 & 3 & 1 & 1 \end{array}\)
The table above shows the scores of 20 students in further mathematics test. What is the range of the distribution?
คำตอบ
(A)
7
28
In how many ways can a student select 2 subjects from 5 subjects?
คำตอบ
(C)
\(\frac{5!}{2!3!}\)
29
In how many ways can 3 seats be occupied if 5 people are willing to sit?
คำตอบ
(A)
60
30
What is the probability that an integer x \((1 \leq x \leq 25)\) chosen at random is divisible by both 2 and 3?
คำตอบ
(C)
\(\frac{4}{25}\)
31
A basket contains 9 apples, 8 bananas and 7 oranges. A fruit is picked from the basket, find the probability that it is neither an apple nor an orange.
คำตอบ
(B)
\(\frac{1}{3}\)
32
The graph above is correctly represented by
คำตอบ
(A)
y = x2 - x - 2
33
In the diagram given, find the value of x.
คำตอบ
(B)
40o
34
The value x in the figure given is
คำตอบ
(D)
130o
35
The bar chart above shows the allotment of time(in minutes) per week for selected subjects in a certain school. What is the total time allocated to the six subjects per week?
คำตอบ
(B)
720mins
36
The pie chart above shows the statistical distribution of 80 students in five subjects in an examination. Calculate how many student offer Mathematics.
คำตอบ
(B)
11
37
If the angles of a quadrilateral are (3y + 10)°, (2y + 30)°, (y + 20)° and 4y°. Find the value of y.
คำตอบ
(C)
30°
38
A square tile has side 30 cm. How many of these tiles will cover a rectangular floor of length 7.2m and width 4.2m?
คำตอบ
(B)
336
39
Find the length of a chord which subtends an angle of 90° at the centre of a circle whose radius is 8 cm.
คำตอบ
(D)
\(8\sqrt{2}\) cm
40
A chord of a circle subtends an angle of 120° at the centre of a circle of diameter \(4\sqrt{3} cm\). Calculate the area of the major sector.
คำตอบ
(C)
8\(\pi\) cm\(^2\)
41
The locus of the points which is equidistant from the line PQ forms a
คำตอบ
(D)
pair of parallel lines to PQ
42
If the midpoint of the line PQ is (2,3) and the point P is (-2, 1), find the coordinate of the point Q.
คำตอบ
(D)
(6,5)
43
Find the equation of the perpendicular bisector of the line joining P(2, -3) to Q(-5, 1)
คำตอบ
(C)
8y - 14x - 13 = 0
44
In triangle PQR, q = 8 cm, r = 6 cm and cos P = \(\frac{1}{12}\). Calculate the value of p.
คำตอบ
(C)
\(\sqrt{92}\) cm
45
If \(\tan \theta = \frac{3}{4}\), find the value of \(\sin \theta + \cos \theta\).
