I can not find a reason to disagree with you. Can the given answer (e) be a misprint

is this from a book or a test prep software?

Agreed- this has to be A I think.

Statement 1 gives us:
x+1<y

so x has to be less than y and 1 is sufficient.

IMO C

For y<-5,
x<(y+1)
or x<-4
but x>y in this case

so A cannot be the answer.

from (1) and (2):
x<(y+1) and x<(y-1)
if y = -5,
x<-4 and x<-6
so x<-6 or x<y

if y=5
x<4 and x<6
so x<y

Hence C is the answer

E

(1) x<y-1 - Insufficient by itself
(2) x<y+1 - Insufficient by itself

Taken together:

y-1<x<y+1

Now pick numbers: assume x=3 and y=3.5 which satisfies both statements. One gets x<y
Now assume x=-3 and y=-3.5 which satisfies both statements. One gets x>3.5

Thus, answer is E.

IMO A

1. y>x+1 assuming the following possibs:

x x+1 y>x+1 X<Y?
-1 0 1 Y
2 3 4 Y
-5 -4 -3 Y
-1/2 1/2 0 Y

So sufficient

2. Y>X-1
X X-1 Y>x-1 x<Y?
1 0 1/2 N
3 2 4 Y
so insufficient

Please correct me if there is mistake

This is from the GMAT Plus tests. I guess there could be an error. Thanks!!

Ans is E

1. x<y-1

say x is 5.5 and y is 6. Insufficient

2. x<y+1

say x is 5.5 and y is 5. Insufficient

Together you can tell that statement 1 will always hold true. Which we have shown is insufficient.

La respuesta es A. Es muy simple. Cuando la resta entre dos numeros es negativa, el primero es menor que el segundo...