Prime and Composite
What is a prime number? Give an example.
A number that only has 2 factors, one and itself. (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97)
Use prime factorization for 18.
2 x 32 or (2 x 3 x 3)
Find the GCF of 10 and 20.
GCF = 10
Simplify 6/9
2/3
Write 8/3 as a mixed number.
2 2/3
Neither
Use prime factorization for 30.
2 x 3 x 5
Which of the following numbers is a common factor of 25 and 35?
A. 5 B. 15 C. 25 D. 10
A. 5
Simplify 7/21
1/3
Write 15/4 as a mixed number
3 3/4
What is a composite number? Give an example.
A number with more than two factors
Use prime factorization for 60.
22 x 3 x 5 or (2 x 2 x 3 x 5)
What is the LCM of 2 and 5?
LCM = 10
Which fraction is equivalent to 1/2
A. 10/19 B. 10/17 C. 10/11 D. 10/20
D.
10/20
Write 3 7/8 as an improper fraction.
31/8
prime
Use prime factorization for 81.
34 or (3 x 3 x 3 x 3)
Which of these numbers is NOT a multiple of 4?
A. 8 B. 40 C. 2 D. 4
C. 2
3/12 = n/4
n = 1
Write 20/5 as a mixed number.
4
Is 4 a prime or a composite number?
Composite
Use prime factorization for 108.
22 x 33 or (2 x 2 x 3 x 3 x 3)
Liam and Noah are sharing a pack of 36 markers and a pack of 48 stickers equally without any leftovers. What is the maximum number of children that can share these packs equally?
A. 6 B. 12 C. 4 D. 8
B. 12
Simplify
13/21
13/21
A recipe calls for 3 2/5 cups of flour. You only have an improper fraction measuring cup. What is 3 2/5 as an improper fraction?
Then, if you accidentally measure 17/4 cups of sugar, what is 17/4 as a mixed number?
The improper fraction is
17/5
4 1/4