Q16

[ShehryarB30]

Why is B wrong?

[ohthatpatrick]

If VZ are together, we should ask ourselves whether they're together in group L, M or P.

It seems like it could potentially be any of the three groups, so let's check it out.

l: V, Z
m: __ __
p: __+

l: __+
m: V Z
p: __+

l: __ +
m: __ __
p: V, Z

We know that when Z is in 'p', Y is also. So in that last frame, Y needs to go to 'p'.
But we also know that V and Y can't ever be together. So we'll scratch out that last frame and just look at the first two.

l: V, Z
m: __ __
p: __+

l: __+
m: V Z
p: __+

In the second one, group 'm' is full, so ST, R, and Y need to go in the remaining groups.
Y cannot go in group 'p', since Z isn't there, so we know where Y ends up in both frames.

l: V, Z
m: Y __
p: __+

l: Y
m: V Z
p: __+

In the first frame, ST couldn't fit in the remaining spot in group 'm', so it'll have to go in 'p'. That leaves R to join Y in group 'm'.

l: V, Z
m: Y R
p: S, T

In the second frame,
l: Y
m: V Z
p: __+

ST could still go in group 'l' or 'p, and so could R, as long as group 'p' gets SOMETHING.

(A) Top frame.
(B) Top frame.
(C) YES! This isn't happening in either frame.
(D) Bottom frame.
(E) Top frame.