610(Q50, V23)
1. Shall I reappear for the exam?
This is a good score, above the mean
It also depends on what colleges are you applying & what is the GMAT range for them
2. If yes, then how shall I start?
Keep on doing 37 of 650+level Quant questions everyday
Verbal, try to find your weak areas
SC Idioms, Parallelism, modifier, etc & ace them
solve set of mix questions from your strengthen topics
3. Shall I practice by attempting a lot of mock exams? Will that help?
It will help to a certain extent
but giving mocks will not give added advantage if the brain doesnt think the way it should
(lookout for patterns in CR & RC)
4. Shall I start with the basics again? I worked on the basics for last few months but I was unable to apply them properly on the main exam! Is it the "gmat effect" or something else?
SC - solve
OG (without timing) with what possible reasons the option can be eliminated
CR - are you doing the pre thinking? If yes, try to find in which topics you find it difficult to do this
if not, again without timing, do pre thinking & then jump into options
RC - pattern & OCTAVE method
5. Is there something wrong with the last day prepartion as I dint solve any questions on that day?
No its not like your normal paper
GMAT is more of a mind & chess game
you have to sacrifice few pawns in order to ACE it!
Best of Luck....