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Lesson details
Key learning points
- In this lesson, we will be investigating the properties and definition of prime factors of numbers, and how to calculate them.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
What is the definition of a factor?
A number divides into another number leaving a remainder
A number that multiplies another number to get another number
Q2.
What is a prime number?
A number that can be divided by even numbers only
A number that can be divided by more than two factors
Q3.
Which of these is not a prime number?
11
3
7
Q4.
Which of these is not a factor of 16?
2
4
8
Q5.
Why do square numbers have an odd number of factors?
Because they are even numbers
Because they are odd numbers
5 Questions
Q1.
What is the first prime number?
1
3
5
Q2.
What are the prime factors of 18?
2 and 5
3 and 5
3 and 6
Q3.
What is the 7th prime number?
19
23
7
Q4.
12 written as a product of prime factors is 2 x 2 x 3. What is 30 written using prime factors?
2 + 3 + 5
2 x 7
5 x 6
Q5.
Which of the following is not a prime factor of 42?
2
3
7