Number Sense & Numeration: Prime And Composite Numbers Answers - Grade 6

SOLUTIONS
N
S
& N
: P
C
N
UMBER
ENSE
UMERATION
RIME AND
OMPOSITE
UMBERS
REMEMBER!
A factor is a whole number that divides another whole number without a remainder.
A prime number is a whole number whose only two factors are one and itself.
A composite number is a whole number that has more than two factors.
Examples:
The factors of 7 are 1 and 7.
7 is a prime number.
The factors of 22 are 1, 2, 11 and 22.
22 is a composite number.
Don’t forget to play Fruit Shoot – Primes & Composites first! Go to mathfrog.ca for the link.
1. List all of the factors of each of the following numbers.
a. 14 ___1, 2, 7, 14______________
f. 43 ___1, 43____________
b. 35 ___1, 5, 7, 35______________
g. 3 ___1, 3______________
c. 21 ___1, 3, 7, 21______________
h. 4 ___1, 2, 4____________
d. 17 ___1, 17__________________
i. 81 ___1, 3, 9, 27, 81______
e. 36 ___1, 2, 3, 4, 6, 9, 12, 18, 36__
j. 19 ___1, 19_____________
2. Write the prime numbers from Question 1. _____17, 43, 3, 19___________________
3. Write the composite numbers from Question 1._____14, 35, 21, 36, 4, 81__________
DID YOU KNOW?
FUN MATH FACT
In ancient Rome it was
The whole numbers 1 and 0
considered a sign of leadership to
are neither prime nor
be born with a crooked nose.
composite.
4. Put a checkmark in the appropriate box. Two have been done for you.
N
P
C
N
P
C
N
P
C
UMBER
RIME
OMPOSITE
UMBER
RIME
OMPOSITE
UMBER
RIME
OMPOSITE
67
49
18
12
11
5
56
9
95
29
20
59
23
51
41
Expectation: Identify and explain the relationship between composite numbers and prime numbers