Mathematics for IGCSE & O level - Number (Section 3)
1
What is the LCM of 84 and 180?
پاسخ دهید
(C)
1260
2
What is the value of k in 96k, given that 96k is a square number?
پاسخ دهید
(C)
6
3
Which of the following is a rational number?
پاسخ دهید
(D)
0.46
4
If two lighthouses flash every 22 and 16 seconds, at what time will they flash together again if they flashed at 10 pm?
پاسخ دهید
(C)
10:04:48
5
What is the lowest common multiple (LCM) of 20 and 50?
پاسخ دهید
(C)
100
6
What is the HCF of 5544 and 2268?
پاسخ دهید
(D)
168
7
Which of the following numbers is a prime number?
پاسخ دهید
(C)
11
8
Buses to Shenley leave every 40 minutes and buses to Winley leave every 15 minutes. If buses to both places leave at 8.15 a.m., when is the next time they leave at the same time?
پاسخ دهید
(D)
9.45 a.m.
9
What is the reciprocal of 1/4?
پاسخ دهید
(B)
4
10
What is the HCF of 84 and 180?
پاسخ دهید
(C)
12
11
What is the value of k in 392k, given that 392k is a cube number?
پاسخ دهید
(B)
3
12
What is the LCM of 45, 60, and 75?
پاسخ دهید
(B)
900
13
Which of the following is a prime number?
پاسخ دهید
(C)
23
14
Which of the following is an Irrational Number?
پاسخ دهید
(D)
√12
15
What is the value of k in 96k, given that 96k is a cube number?
پاسخ دهید
(B)
3
16
Find the largest possible side length for squares, given that a rectangle measures 240mm by 204mm.
پاسخ دهید
(D)
12 mm
17
What is the next time that the lights flash at the same time if the lights flash every 22 and 16 seconds respectively? Both lights switched on at 10 p.m.
پاسخ دهید
(B)
10:04:48 p.m.
18
What is the result of expressing 0.666... as a fraction?
پاسخ دهید
(B)
2/3
19
Which of the following are common multiples?
پاسخ دهید
B
D
20
Find the largest possible side length for the identical squares that will make up a 240 mm by 204 mm rectangle.
پاسخ دهید
(C)
12 mm
21
Which of the following numbers is NOT a natural number?
پاسخ دهید
(C)
0
22
Which is the product of prime factors of 144?
پاسخ دهید
(C)
2^4 x 3^2
23
Which of the following statements are true about a common factor of two numbers?
پاسخ دهید
A
D
24
What is the HCF of 260 and 300?
پاسخ دهید
(B)
10
25
What do you call the largest number that is a factor of two or more numbers?
پاسخ دهید
(B)
Highest Common Factor
26
Which of the following best describes an Irrational number?
پاسخ دهید
(C)
A number that cannot be written as a fraction.
27
Which of the following numbers is a prime number?
پاسخ دهید
(C)
17
28
Which of the following is NOT a common multiple of 2 and 5?
پاسخ دهید
(D)
15
29
What is the HCF of 45, 60, and 75?
پاسخ دهید
(C)
15
30
What do you call the smallest number that is a multiple of two or more numbers?
پاسخ دهید
(D)
Lowest Common Multiple
31
What is the lowest common multiple (LCM) of 2 and 5?
پاسخ دهید
(D)
10
32
What is the highest common factor (HCF) of 20 and 50?
پاسخ دهید
(C)
10
33
What is the highest common factor (HCF) of 48 and 84?
پاسخ دهید
(C)
12
34
If the HCF of two numbers is 4, which of the following could be the two numbers?
پاسخ دهید
(B)
12 and 20
35
Which of the following is NOT a rational number?
پاسخ دهید
(C)
π
36
Which of the following is an example of a natural number?
پاسخ دهید
(C)
1
37
Which of the following is NOT a factor of 24?
پاسخ دهید
(D)
7
38
Which set of numbers contains only natural numbers?
