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Draw and colour-code factor trees for 3 numbers between 150 and 200.
Check that the products of the prime factors
equal the root number for each tree in@] and [I].
This shows one way to grow a simpler
factor tree for 60.
Show that you can grow 4 other
factor trees for 60 in this way.
The tree in~ has 4 prime factors.
Design a factor tree with at least 6 prime factors.
84 85 175 380 490
• Decide which are possible and impossible. possible products impossible products
• Use a calculator if it helps. 3 x 3 x 7 = 63 52
