Prime and Composite
A number that has exactly two factors; one and itself.
A prime number
What are numbers multiplied together to create a product.
Factors
What is the GCF of 36 and 48?
12
2x2x3x5
60
What is a Mersenne Prime?
A prime number in the format 2n - 1
What kind of numbers have an odd number of factors?
Square numbers
How many factors are in 24? List the factors of the number 24.
8 ; 1, 2, 3, 4, 6, 8, 12, 24
Find the LCM for 12 and 15
60
The prime factorization of 20. Use exponents when needed.
What is 2x2x5? 2^2 x 5
What are Twin Primes?
Prime numbers with a difference of 2
What are the first 5 prime numbers?
2, 3, 5, 7, 11.
List the factors of the number 25.
1, 5, 25
Paul has 16 fish pictures and 12 deer pictures to display. He wants to arrange the pictures in rows with the same numbers of fish and of deer pictures in each row. What is the greatest number of rows he can make?
4 rows
72
Which prime number is part of two pairs of twin primes?
5
This number is the only whole number that is neither prime nor composite.
1
What is 6 x 28? What is that number's prime factorization?
168 ; 23 x 3 x 7
Molly does ten sit-ups every 3 hours and fifteen push-ups every 2 hours. She does 10 sit-ups and 15 push-ups at 8 AM. At what time will she do them both again?
2 PM
The prime factorization of 25.
52
How many twin primes are there?
Infinitely many
A number that has at least 3 factors is ...
composite
What is 7 x 27? What is that number's prime factorization?
189 ; 33 x 7
Hotdogs are sold in packages of 6. Buns are sold in packages of 8. What is the least number (LCM) of hotdogs and buns that should be bought to have an equal amount of each?
What is 24?
4 packages of hotdogs 4 x 6 = 24
3 packages of buns 3 x 8 = 24
What is the prime factorization of 99?
32 x 11
What is a Sophie-German prime?
A prime number where 2 x (prime number) + 1 is also prime.