We've seen that prime and composite numbers are two types of numbers that can help us with calculations.
The only factors a prime number has is 1 and itself.
Which of the following numbers are prime?
Every whole number greater than 1 is either a prime number or a composite number
All even numbers greater than 2 are composite numbers
To be a prime number, a number can only have itself and 1 as factors
0 and 1 are not prime or composite numbers
Write down the next square number after 16.
If we multiply a number by itself, we make a square number. If we use dots to picture this as an array it will make a square shape.
Write down the next 3 triangular numbers.1,\,3,\,6,\,10,\,15,\,⬚,\,⬚,\,⬚
With triangular numbers, we add 1 more dot to each new row and create a triangle shape with dots.
Identify and describe properties of prime, composite, square and triangular numbers.