Hi All,

When DS questions look complex, they often hide subtle patterns. While you might not immediately 'see' what the pattern is, you can do a bit of work (TEST VALUES) and PROVE the pattern exists.

Here, we're told that |A+5| = |B+5|. We're asked for the value of A+B.

Fact 1: B>5 and A<5

This means that A and B CANNOT be the same number. Let's TEST VALUES and see what happens....

IF...

B = 6

|A+5| = 11

Since we were told that A<5, A can only have one solution....A = -16 (since |-16+5| = |-11| = 11).

The answer to the question is 6 + (-16) = -10

IF...

B = 7

|A+5| = 12

Since we were told that A<5, A can only have one solution....A = -17

The answer to the question is 7 + (-17) = -10

We were NOT told that A and B had to be integers though, so I'll try one more TEST....

IF...

B = 5.5

|A+5| = 10.5

Since we were told that A<5, A can only have one solution....A = -15.5

The answer to the question is 5.5 + (-15.5) = -10

The answer is ALWAYS -10

Fact 1 is SUFFICIENT

Fact 2: B = 10

This tells us nothing about the value of A.

Fact 2 is INSUFFICIENT.

Final Answer:

GMAT assassins aren't born, they're made,

Rich