Data interpretation- GMATPrep

r = 2q
s = q + r = 3q
t = q + s = 4q

u = q + r
v = s + u
w = t + v

x = q + u
y = x + v


Actually u dont need to find all the values ..above if we just find the first three values we knonw we can find the rest ...

stmt1 : INSUFF

stmt2:

now this is a IS question i.e z=20q or z <>20q should suffice to answer the Q

so the way I look at it is that we only need to express z interms of q, if that can be done then it is immaterial whether z= 20q or z<>20q, coz both will be SUFF

now here we can see that z=w+y, as we go on expressing the variables using the logic provided in stmt 2, we would ultimately be able to express z in terms of q

SUFF

Thanks Samir,
That's right, it does't matter whether the answer is YES or NO as long as it is consistent, so that statement (2) is sufficient....That makes the question doable within 2 minutes...