Question

Whats the highest common factor of 4 and 10

Answer 1

4/2=2
10/2=5
no more common factors after you divide by 2
so gcf=2

Answer 2

oh yeah i forgot how to work it out thank you :P

Answer 3

np
you could write it like this
write prime factorizations for both
4=2*2
10=2*5
they only have a two in common so gcf=2

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example:12 and 18
12=2*2*3
18=2*3*3
gcf=2*3