# GMAT Data Sufficiency DiscussionsGMAT & GRE Prep Report

The GMAT and Related Discussions section is very fragmented in terms of the information available at one's disposal. There are one of reply threads and several other redundant threads that have masked the more important ones.
This is an attempt to make the best of explanations, reasonings, qu...
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1.
in triangle BOC, let OBC=OCB=x degrees
hence, BOC=180-2x
in triangle ABO, let BAO=BOA=x degrees

using st.1,
COD=60,
hence, BOC+BOA=120 degrees
hence, 180-2x+x=120
hence, x=60...
st.1 is sufficient
using st.2,
BCO=40..hence, BAO=40
st.2 is also sufficient...

2.
i dunno man :(

3.
using st.1,
the only option that satisfies 530 miles is he drove the x miles in 7 hrs and remaining in 3 hrs...

hence, st.1 is sufficient

using st.2,
u do not know hw much time he took to cover the remaining distance..he cud take 6 hrs for the first part and 2 hrs for the remaining, or 17 hrs for the first and 13 for the second..so on..