Divisibility Rules
This number divides evenly into all even numbers. What divisibility rule is this?
What is 2.
A number that has exactly two factors; one and itself.
What is a prime number.
What are numbers multiplied together to create a product.
factors.
What is the GCF of 8 and 10
2
2 x 2 x3 x5
60
This number divides evenly into all numbers that end with 5 and 0. What divisibility rule is this?
What is 5.
This number is the only even prime number.
What is 2.
LIST the factors of the number 24. How many factors are there?
1, 2, 3, 4, 6, 8, 12, 24 (There are a total of 8)
Find the LCM for 12 and 15
What is 60.
The prime factorization of 20.
What is 2x2x5? or 22 x 5
You do this to a number to decide if the number is divisible by the number 3.
What is find the sum of the digits.
These are the first 5 prime numbers.
What are 2, 3, 5, 7, 11.
List the factors of the number 25. How many are there?
1, 5, 25 There are 3
GCF (10, 34)
What is 2
2 x 2 x 2 x 3 x 3
What is the prime factorization of 72?
These are the two numbers that both need to evenly divide into a number to make the number also divisible by 6.
What are 2 and 3.
This number is the only whole number that is neither prime, nor composite.
What is 1.
The common factors of 24 and 18
What is 1, 2, 3, 6
LCM (10, 35)
What is 70
The prime factorization of 25.
What is 5x5 or 52?
Which of the following numbers divide equally into 342? 2,3,4,5,6,9,10.
What are 2, 3, 6, 9
A number that is greater than 10 and divisible by 5 (prime or composite)
What is composite.
The common factors of 32 and 40
LCM (8, 12)
What is 24
3 x 3 x11
What is the prime factorization of 99?