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