How to resolove that proportion , i've tried picking numbers but is unsuccessfull^
If w, x, y and z are positive and w/x=y/z, which of the following is not always true ?
a)wz=xy
b) x/w=z/y
c)x/y=z/w
d)(w+x)/z=(y+z)/z
e) (x+w)/w=(z+y)/y
Right answer - C
If w, x, y and z are positive and w/x=y/z, which of the following is not always true ?
a)wz=xy
b) x/w=z/y
c)x/y=z/w
d)(w+x)/z=(y+z)/z
e) (x+w)/w=(z+y)/y
Right answer - C
Last edited by Fokin on Wed Apr 21, 2010 11:09 pm, edited 1 time in total.
