Factors and Multiples
Define factors.
A number that divides into another number evenly.
A number that can be multiplied with another to create a product.
What is the GCF of 16 and 2?
2
How do you find the multiple of a number?
Skip count
Add the number repeatedly
Multiply the number by other numbers.
What is the first step needed to simplify this expression? 5 + 10 x 2
x (multiply)
What is an even number?
A number that is divisible by 2
List 3 multiples of 8.
8, 16, 24, 32, 40, ....
What is the GCF of 28 and 36?
4
What is the LCM of 5 and 3?
45
Simplify: 15 - (5 + 23)
2
How do you know whether a number is divisible by 3 without actually dividing?
Add the digits. If the sum is divisible by 3, then the number is also.
What are all the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
What is the greatest common factor of 24, 12, and 20?
4
What is the LCM of 4 and 6?
12
Simplify: (2 + 4)2 - (7 + 2)
27
Which of these numbers are divisible by 2 and 3?
18 22 27 40 36
18 and 36
What is the prime factorization of 96?
2 x 2 x 2 x 2 x 2 x 3
What is the greatest common factor of 36, 12, and 60?
12
What is the lcm of 3, 6, and 8?
24
What is 35 called?
Power
Is 57 is divisible by any of these?
2 3 5 10
yes, 3
What is the prime factorization of 54? (Use exponents)
2 x 33
What is the greatest common factor of 3 and 5?
1
What is the LCM of 14 and 10?
70
Which expression is equal to 23 + 6?
A) 3 x 7
B) 2 + (5 - 1)2
C) (9 - 14) + 23 - 2
D) None of the above
C
Give 2 prime numbers that are greater than 20 and less than 50.
23, 29, 31, 37, 41, 43, 47