Prime Time Factors
Is the number 2 prime or composite?
Prime — it’s the only even prime number.
What are the factors of 12?
1, 2, 3, 4, 6, 12.
Is 37 prime or composite?
Prime.
Explain why 11 is prime.
It can only be divided by 1 and 11.
Name two prime numbers between 1 and 10.
2, 3, 5, or 7.
What are the factor pairs of 18?
(1,18), (2,9), (3,6).
Is 49 prime or composite?
Composite — 7×7 = 49.
Why is 25 not prime?
Because 5×5 = 25 — more than two factors.
Why is 1 not a prime number?
Because it has only one factor — itself.
How many factors does a prime number have?
Exactly two.
Name the only even number that is NOT composite
2
Why do we call 7 a “special” number?
It is prime and often used in patterns.
Think of one Prime number between 10 and 20
11, 13, 17, 19
Give the factor pairs for 24.
(1,24), (2,12), (3,8), (4,6).
Which number between 20 and 30 is prime?
23 or 29.
Explain why prime numbers help in coding and technology.
They’re used in encryption because they can’t be easily divided.