Number Properties Flashcards Preview

10M2 Mathematics > Number Properties > Flashcards

Flashcards in Number Properties Deck (17):
1

What does HCF stand for?

Highest Common Factor

2

What does LCM stand for?

Lowest Common Multiple

3

What is a highest common factor?

The biggest value that divides exactly into two other numbers

4

What is a lowest common multiple?

The small value that two different numbers both divide into

5

List the factors of 12

1, 2, 3, 4, 6, 12

6

List the factors of 40

1, 2, 4, 5, 8, 10, 20, 40

7

What is the HCF of 12 and 20?

4

4 is the biggest number that divides into both 12 and 20

8

What is the HCF of 72 and 60?

12

12 is the biggest number that divides into both 72 and 60

9

What is the LCM of 12 and 20?

60

60 is the smallest number in both the 12 and 20 timestables

10

What does it mean to write a number as 'a product of primes'?

You need to write the number as a multiplication using only prime numbers. For example, 12 written as a product of primes is 2x2x3 or 2^2x3

11

Which of these numbers are prime?
1, 5, 15, 16, 17, 23, 27, 33

5, 17, 23

They can only be divided exactly by themselves and 1

12

Which of these numbers are square?
1, 5, 15, 16, 17, 23, 27, 33

1, 27

1 is 1x1x1 and 27 is 3x3x3

13

List the prime numbers between 0 and 10

2, 3, 5, 7

14

List the prime numbers between 10 and 20

11, 13, 17, 19

15

List the prime numbers between 20 and 30

23, 29

16

What is a prime number?

A number which has only two different factors, itself and 1.

17

3 x ? = 4.5

1.5

4.5/3 = 1.5