X, Y, and Z are positive integers, and X+2Y+2Z=13. Z=?
1). X>Y>Z
2). None of them is equal to 4
qa is a
1). X>Y>Z
2). None of them is equal to 4
qa is a
Appetite for 700 and I scraped my plate!
X + 2(Y+Z) = 13
From (A)
Z = 1 , Y = 2 , X =7
Z = 2, Y = 3 , X =3 --> fails
so Z = 1, hence sufficient
from (B)
Z = 1 , Y = 2 , X =7
Z = 2, Y = 3 , X =3
Z = 3, Y = 2 , X =3
so not sufficient to find a unique value of Z
