japped187 wrote:

If m and r are two numbers on a number line, what is the value of r?

(1) The distance between r and 0 is 3 times the distance between m and 0.

(2) 12 is halfway between m and r.

E for me

Lets say distance between origin and m=x

so,between origin and r=3x

Distance between m and r= 3x-x = 2x or 3x+x=4x (depending on which side of 0 does r or m lie on )

1 is not enough

2 in itself is not enough

But if we use both

12 is half way between m and r

distance between m and r= 2x or 4x

so we cant say for sure.

E for me