Factors, primes, square and cube numbers
![Picture](/uploads/4/6/1/6/46161329/1671485.jpg?156)
Factors
Factors are the easy part. You put two factors together in a multiplication and that's all you need to remember. Every time you write out your times tables you are writing the factors.
The numbers in the question are the factors!
The product is the answer to your times tables.
For instance 3 X 4 = 12
The factors are 3 and 4
The product is 12
Square numbers
They are called square numbers because if you draw what it is asking you to do it will make a square shape.
Q. How do I know I am being asked about square numbers?
A. There is a little number two in corner of your number.
Q. What is the opposite of square numbers?
A. The square root
The square root uses the answer to find the question....
If the answer is 16 we need to know what factors made 16.
Remember with square numbers both factors are the SAME number.
On your calculator find your square root button. Press that, then the number 16, then equals. Some calculators will want you to type the numbers first then the root button.
Just remember which way around your calculator does it.
So...
The answer is 16.
Once you press the equals it should show you the number 4 because 4 x 4 = 16
Still two factors but both the same number.
Factors are the easy part. You put two factors together in a multiplication and that's all you need to remember. Every time you write out your times tables you are writing the factors.
The numbers in the question are the factors!
The product is the answer to your times tables.
For instance 3 X 4 = 12
The factors are 3 and 4
The product is 12
Square numbers
They are called square numbers because if you draw what it is asking you to do it will make a square shape.
Q. How do I know I am being asked about square numbers?
A. There is a little number two in corner of your number.
Q. What is the opposite of square numbers?
A. The square root
The square root uses the answer to find the question....
If the answer is 16 we need to know what factors made 16.
Remember with square numbers both factors are the SAME number.
On your calculator find your square root button. Press that, then the number 16, then equals. Some calculators will want you to type the numbers first then the root button.
Just remember which way around your calculator does it.
So...
The answer is 16.
Once you press the equals it should show you the number 4 because 4 x 4 = 16
Still two factors but both the same number.
Cube numbers
Cube numbers are worked the same way as square numbers. The main difference this time is that there is a little 3 in the corner and you need that factor used three times. It is still the same number repeated three times.
Q. What does it mean if my number has a little three in one corner?
A. That would be a cube number. Same technique as above but with three numbers now because for a cube you would need three measurements (length, width, height).
Cube numbers are worked the same way as square numbers. The main difference this time is that there is a little 3 in the corner and you need that factor used three times. It is still the same number repeated three times.
Q. What does it mean if my number has a little three in one corner?
A. That would be a cube number. Same technique as above but with three numbers now because for a cube you would need three measurements (length, width, height).
Prime numbers (blue chart)
These numbers are linked but very unique.
A prime number still has two factors. This time there will only ever be two factors.
if i give you a prime number there is only ONE way to get the right answer.
Like all times tables there are two numbers used. For a prime number one of the factors is ALWAYS the number ONE!
The other factor is the number you are trying to find out about.
For an example look at the number 7.
The only way you can make 7 using your times tables is by doing 1 X 7 = 7
THERE IS NO OTHER WAY TO MAKE 7!!!
This is the same for any prime number...
11 is 1 x 11
13 is 1 x 13
19 is 1 x 19
61 is 1 x 61
These numbers are linked but very unique.
A prime number still has two factors. This time there will only ever be two factors.
if i give you a prime number there is only ONE way to get the right answer.
Like all times tables there are two numbers used. For a prime number one of the factors is ALWAYS the number ONE!
The other factor is the number you are trying to find out about.
For an example look at the number 7.
The only way you can make 7 using your times tables is by doing 1 X 7 = 7
THERE IS NO OTHER WAY TO MAKE 7!!!
This is the same for any prime number...
11 is 1 x 11
13 is 1 x 13
19 is 1 x 19
61 is 1 x 61