Divisibility Rules
Prime and Composite
Factors
Greatest Common FActor
Prime Factorization
100
This number divides evenly into all even numbers.
What is 2.
100
A number that has exactly two factors; one and itself.
What is a prime number.
100
What are numbers multiplied together to create a product.
What are factors.
100
This is the definition of Greatest Common Factor.
What is the largest factor two (or more) numbers have in common.
100
2x2x3x5
What is 60?
200
This number divides evenly into all numbers that end with 5 and 0.
What is 5.
200
This number is the only even prime number.
What is 2.
200
The total factors of the number 24.
What is 8. (1, 2, 3, 4, 6, 8, 12, 24)
200
The GCF between 30 and 25.
What is 5.
200
The prime factorization of 20.
What is 2x2x5?
300
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.
300
These are the first 5 prime numbers.
What are 2, 3, 5, 7, 11.
300
This number is the total number of factors of the number 25.
What is 3. (1, 5, 25)
300
The GCF between 36 and 12.
What is 12.
300
2x2x2x3x3
What is the prime factorization of 72?
400
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.
400
This number is the only whole number that is neither prime, nor composite.
What is 1.
400
This number is the total number of factors for the number 13.
What is 2. (1, 13)
400
The GCF between 49 and 21.
What is 7.
400
The prime factorization of 25.
What is 5x5?
500
These numbers all divide equally into 342.
What are 2, 3, 6.
500
A number that is greater than 10 and divisible by 5 be prime or composite.
What is composite.
500
This number is the total number of factors of 30.
What is 8. (1, 2, 3, 5, 6, 10, 15, 30)
500
The GCF of 19 and 24.
What is 1.
500
3x3x11
What is the prime factorization of 99?
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