Posted by **Nathan** on Tuesday, October 11, 2011 at 7:45pm.

How do you find GCF (boomerang method)?

- math -
**Reiny**, Tuesday, October 11, 2011 at 8:00pm
I have no idea what the boomerang method is, but for hundreds of years it was done this way ....

e.g.

find GCF of 30 40 and 75

30 = 2*3*5

60= 2*2*3*5

300 = 2*2*5*5*3

What factors do you see in all 3 lines?

I see 2*3*5

= 30

e.g.

what is the GCF of 24 , 80 , 450 ?

24 = 2*2*2*3

80 = 2*2*2*2*5

450 = 2*3*3*5*5

GCF = 2

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