Prime/ Composite Numbers
Is the number 3 prime or composite?
Prime
Name all factors of the number 12
1,2,3,4,6,12
List the first four multiples of 5.
5, 10, 15, 20
5 × 3 = 15
Write a multiplicative comparison sentence.
15 is 5 times as many as 3.
(or) 15 is 3 times as many as 5.
Find the rule: 2, 4, 6, 8, 10
+2
Is the number 9 prime or composite?
Composite
Name all factors pairs of the number 18
1x18, 2x9, 3x6
List the first 10 multiples of the number 7.
7,14,21,28,35,42,49,56,63,70
“8 is 4 times as many as 2.” Write an equation to match
2x4=8
Find the rule and missing number:
3, 6, 9, __, 15, 18
12 (Rule: +3)
Is 52 prime or composite? If this number is composite, list all factor pairs
Composite: 1x52,2,26,4x13
A number has exactly two factors: 1 and itself. What kind of number is it?
A prime number
What multiple do the numbers 3 and 4 have in common?
12
Mia has 6 pencils. Her brother has 4 times as many pencils.
Write an equation and find how many pencils her brother has.
Equation: 6 × 4 = 24
➡️ Answer: Her brother has 24 pencils.
What is the next number in this pattern?
5, 10, 20, 40, ___
80
Which number is not prime — 19, 23, 27, 29?
27 (3 × 9)
What are the prime factors of the number 20?
2 and 5
What is the 6th multiple of 6?
36
Equation: 7 × 9 = 63
Which sentence correctly describes the equation?
A. 9 is 7 times as many as 63
B. 63 is 9 times as many as 7
C. 7 is 63 times as many as 9
D. 63 is 7 less than 9
B. 63 is 9 times as many as 7.
The pattern rule is “add 4, then subtract 2.” What are the first five numbers if the pattern starts at 2?
2, 6, 4, 8, 6
Which set contains only prime numbers?
a. [13,15,19,23]
b. [7,11,31,37]
c. [19,47,43,54]
b.[7,11,31,37]
What are the prime factors of the number 21?
3 and 7
Name one number that is a multiple of both 8 and 12.
24
The equation 5 × ? = 45 shows that 45 is how many times as many as 5?
9 times as many
Identify the rule and the next number in the pattern: 95,86,77,68,___
Rule -9, Next number: 59