Factors
What are all the factors of 8?
1, 2, 4, 8
List 4 multiples of 9.
9 , 18, 27, 36, 45, etc
Is 27 prime or composite? How do you know?
Composite, 3x9=27
Write all the factors and two multiples of 18.
1,2,3,6,9,18
18, 36
Malcolm says bigger numbers always have more factors. Is Malcolm correct? If yes, explain. If no, provide a counter example.
No.
16: 1 ,2, 4, 8, 16
17: 1 , 17
17 is bigger than 16 but has fewer factors. Primes will have fewer factors than all composite numbers.
List 3 multiples of 4 that don't include the digits 4 or 8.
16, 20, 32
Are all even numbers composite? If yes, explain. If no, give an example.
No, 2 is not composite.
Write two multiples of 8 that have a factor of 6.
24, 48, 72
List the factors of 36
1, 2, 3, 4, 6, 9, 12, 18, 36
Mohmmad claims larger numbers always have more multiples. Is this true? If yes, explain. If no, give a counter example.
No, there are infinite multiples for every number.
2: 2, 4, 6, 8........ to infinity
4: 4, 8, 12, 16 .........to infinity
How many composite numbers are there from 1-20?
11
What is the largest number that is a factor of 8 and a factor of 12?
4
A number has 5 factors. How many factor pairs does it have? What number could it be?
3 factor pairs,
16: 1, 2, 4, 8, 16
List all multiples of 2 that are also factors of 36.
36: 1, 2, 3, 4, 6, 9, 12, 18, 36
multiple of 2 and factor of 36: 2, 4, 6, 12, 18, 36
How many prime numbers are there from 1-20? What are they?
8 prime numbers
2,3,5,7,11,13,17,19
Kurt says factors and multiples are related. Use the equation 3 × 9 = 27 to describe the relationship between factors and multiples.
27 is a multiple of 9 and a multiple of 3.
(3, 9) is a factor pair of 27.
when you multiply to a number by a factor to create a multiple, your number and factor are both factors of that multiple.
Which list has all the factors of 54?
a: 1 , 2, 6 , 9, 27, 54
b: 0, 1 , 2, 3, 6 , 9, 18, 27, 54
c: 1 , 2 , 3 , 4 , 6 , 9, 13, 18, 27, 54
d: 1 , 2, 3, 6 , 9, 18, 27, 54
d
54: 1 , 2, 3, 6 , 9, 18, 27, 54
Marnie needs 7 beads to make a bracelet. She has somewhere between 50 and 65 beads. Name two multiples of 7 that are between 50 and 65.
56 beads, 63 beads
Write the factors of 60 that are also prime numbers.
2, 3, 5
Mr. Sinchi has an equation where the dividend is a multiple of 6, the quotient is a factor of 8, and the divisor is a multiple of 9.
Write two equations that might match Mr.Sinchi's.
18 div 9=2
36 div 9 = 4
54 div 27 = 2