Divisibility Rules
What is the divisibility rule for 2?
The number must end in a 0,2,4,6,8
What divisibility rule applies when the sum of the digits are divisible by 3?
The divisibility rule for 3.
The divisibility rule for 2.
What is the last digit 0, 2, 4, 6, 8?
What is 345 divisible by?
5
What is a composite number?
Numbers divisible by multiple factors
What divisibility rule applies for a number must end in 0.
The Divisibility Rule for 10?
What is your favorite day of the week?
Hopefully a day when we have math class!
What divisibility rules state that the last digit must end in 0?
The divisibility rule for 10
What is 111 divisible by?
3
Give an example of a composite number
Great work!
What are the 3 divisibility rules that work for 50?
2, 5, and 10
What divisibility rule applies when the last two digits are divisible by 4?
The divisibility rule for 4
The last 3 digits are divided by 8.
What is the divisibility rule for 8?
What is 5896 divisible by?
2
Give an example of a prime number
You've got this!
What divisibility rule applies when the number must end in 5 or 0?
The Divisibility Rule for 5
What divisibility rule applies for a number that ends in 0, 2, 4, 6, 8?
2
Rule 2 and rule 3 apply.
What is the divisibility rule for 6?
What is a prime number?
A number divisible only by itself and 1
Is 15 a prime or composite number?
Composite
Why do we use divisibility rules?
To help us determine the factors of numbers quickly and without having to do long division each time.
Which divisibility rules applies to 684? Hint, there are three!
2, 3, 4,
The last digit is 0 or 5.
What is the divisibility rule of 5?
What 3 divisibility rules work for 100?
2, 5 and 10
Is 49 a prime or composite number?
Composite