Ch 4. Special Number & Divisibility Rules

Ch 4. Special Number & Divisibility Rules

by PRISCILLIA SUHARDY

Multiple Choice

LCM of 18 and 12 is ...

• 6

• 3

• 216

• 36

Multiple Choice

GCF of 24 and 32 is ...

• 8

• 4

• 64

• 96

Multiple Choice

The multiples of 3 is all odd numbers.

• True

• False

Poll

Select all the even numbers

• 42

• 53

• 74

• 27

• 85

Poll

Select all the odd numbers

• 43

• 78

• 90

• 25

• 39

Open Ended

Define/describe the difference between even and odd numbers.

​Even Numbers Vs Odd Numbers

An even number is a number that can be divided into two equal groups.

=> Can be divided by 2​

​

​

​An odd number is a number that cannot be divided into two equal groups.​

​ => Cannot be divided by 2

​Prime Number VS Composite Numbers

​A prime number is a positive whole number which only can divided by 1 and itself.

​

​

​

​A composite number is numbers other than prime numbers

​

Multiple Choice

The groups of Prime Numbers is ....

• 1, 2, 3, 5, 7

• 1, 3, 5, 7

• 2, 4, 6, 8

• 2, 3, 5, 7

• 2

Poll

Select all number that can be divided by 2

• 21

• 12

• 26

• 43

• 56

Multiple Choice

The number that have factor 10 is ...

• 24

• 50

• 95

• 128

Multiple Choice

The number that can be divided by 5 is ... .

• 85

• 96

• 78

• 21

Multiple Choice

The multiples of 4 is ....

• 98

• 124

• 226

• 234

​Find the multiples of 4

​Rules :

​A number can be divided by 4 if the last two numbers can be divided by 4.

​

​Examples :

​98

​

​124

​

​226

​

​234

​Divisibility Rules

​Divide by 2 : IF the number is Even Numbers.

​

​​Divide by 5 : IF

​

​Divide by 10 : IF

​

​Divide by 4 : IF

​

​Divide by 8 : IF

​Divisibility Rules

​Divide by 2 : IF the number is Even Numbers.

​

​​Divide by 5 : IF the last number is 5 or 0.

​

​Divide by 10 : IF the last number is 0.

​

​Divide by 4 : IF the last two numbers can be divided by 4.

​

​Divide by 8 : IF the last three numbers can be divided by 8.

Multiple Choice

The number that can be divided by 4 is ...

• 5245

• 7326

• 9182

• 6156

Multiple Choice

The number that can be divisible by 8 is ....

• 1432

• 2332

• 3228

• 4286

Multiple Select

2360 can be divided by  ... (can choose more than 1 answers)

• 3

• 4

• 5

• 6

• 8