Hey  I got 7 and Brinjol.

Regarding 7 : I guess it is the difference between 12 and 5, since all are
familiar with basic mathematics, which might be the reason for getting the
answer same,( for 1st part as 7) by most of our friends,

Regarding 'vegetables' : most of us got different answers because every
body will use different vegetables depending on their own tastes, every one
will think about most familiar one what they use very frequently.
                                                              This explains
why we got different answers for second part.
Tell me i am correct or no!.

Mahesh.
Wipro Systems