Greatest Common Factor
Find the GCF 6 and 15.
3
Find the LCM of 4 and 6.
12
List Factors for 16
1, 2, 4, 8, 16
Is 16 prime or composite. List the factor pairs
composite
1x16 2x8 4x4
Find the prime factorization of the following answer:
42 x 23 = ____
27
Find the GCF of 36 and 54.
18
Find the LCM of 12 and 18.
36
DOUBLE JEOPARDY!
Define factors and multiples.
factors -All the numbers that divide into a number without a remainder
multiples - The product of a number multiplied by another whole number.
Is 47 prime or composite. List the factor pairs
prime
1x47
Solve:
(12.52 x 102) + (.748 x 103) =
2000
DOUBLE JEOPARDY!
What are the steps to find the GCF?
1. Find the prime factorization of each number
2. Find common prime factors
3. Multiply common factors
Find the LCM of 15 and 25.
75
List first 6 multiples of 4
4, 8, 12, 16, 20, 24
Define prime and composite.
Prime - A number greater than 1 that has only two factors — 1 and itself.
Composite - A number greater than 1 that has more than two factors.
What are the common factors of 18, 32 and 72?
1, 2
Find the GCF of 54 and 81.
27
DOUBLE JEOPARDY!
What are the steps to find the LCM?
1. List the prime factors of each number
2. For each prime, take the highest exponent
3. Multiply the taken primes
List the factors of 8 and the first 6 multiples of 8.
Factors:1,2,4,8
Multiples: 8, 16, 24, 32, 40, 48
Is 52 prime or composite. List the factor pairs
composite
1x52 2x26 4x13
What is the prime factorization of 186?
2x3x31
13
Find the LCM of 48 and 36.
144
List the factors of 54 and four multiples of 54
Factors: 1, 2, 3, 6, 9, 18, 27, 54
Multiples:108, 162, 216, 270
Is 1 prime or composite. List the factor pairs
neither prime or composite
Round answer to the nearest thousandths:
23,897,643,901.6543 divided by 107
2,389.764