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This is a prime factor tree. A prime factor
The prime factors are at is a factor
which is also
the end of each branch. a prime number.
The number 1 cannot be used.
KEY Q means 'is a prime factor'.
Do you agree that the
missing factor is 2?
Write the factors represented by the letters in each tree.
In tree a, f= 5
a Multiply together the prime
factors of each tree in ITJ .
b Explain what is special about ~-]
the product each time.
@] Draw factor trees for these numbers.
Use a colour key to show prime factors.
a 100 b 64 c 120 d 72
