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|m-n|= |m| - |n|

Expert replies
Source: — Data Sufficiency |

by Mike@Magoosh » Wed Mar 14, 2012 2:06 pm
Hi, there. I'll help with this. :)

If you use the numbers m = 5, n = 1, it's consistent with both statements and you get a yes answer to the prompt.

If you use the numbers m = 5, n = -1, it's consistent with both statements and you get a no answer to the prompt.

Therefore, different choices allowed by either statement or by both statements together lead to different answers to the prompt. No combination allows for a definitive answer to the prompt.

Answer = E

Does all that make sense? Let me know if you have any questions about what I've said here.

Mike :)
Magoosh GMAT Instructor
https://gmat.magoosh.com/
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