Question

What is the GCF of 18 and 30?

Answer 1

`6`

Explanation:

`"this method uses only "color(blue)"subtraction"" to find GCF"`

`• " Subtract smaller number from larger number"`

`• " Repeat this until a "color(red)"common value ""is obtained"`

`• "The "color(red)"common value ""is the GCF"`

`•color(white)(x)30" and "18larrcolor(blue)"starting numbers"`

`30-18=12larr"larger subtract smaller"`

`•color(white)(x)18" and "12larrcolor(blue)"numbers after subtraction"`

`18-12=6larr"larger subtract smaller"`

`•color(white)(x)12" and "6larrcolor(blue)"numbers after subtraction"`

`12-6=6larr"larger subtract smaller"`

`•color(white)(x)6" and "6larrcolor(red)"common value"`

`rArr"GCF "=6`