GMAT

GMAT preparation books:
Veritas Prep Complete GMAT Course Set
The Complete GMAT Strategy Guide Set by Manhattan Prep
The Official Guide to the GMAT Review 2018
MAT and XAT preparation books -
How to Prepare for Quantitative Aptitude for the CAT by Arun Sharma (Published by McGraw Hill)
How to Prepare for Data Interpretation for CAT by Arun Sharma (Published by McGraw Hill)
Logical Reasoning and Data Interpretation for the CAT by Nishit K Sinha (Published by Pearson)
How to Prepare for Logical Reasoning for the CAT by Arun Sharma (Published by McGraw Hill)
Logical Reasoning and Data Interpretation for the CAT by Nishit K Sinha (Published by Pearson)
How to Prepare for Verbal Ability and Reading Comprehension for CAT-by Arun Sharma & Meenakshi Upadhyay.

Hello dear,
Your GMAT score is pretty low. But, there are some good colleges that NIT requires GMAT score.
1. Northwestern University Kellogg Executive MBA
This programme requires you to have at least eight years of work experience with an average of 12-15 years. It spans over two years and covers all aspects of general management. The GMAT score is usually not needed; the admissions committee would review the application and decide if it's required.
2. Duke Fuqua Global Executive MBA
This is a fifteen month duration programme and comprises of five terms, two of which include a two-week residency on the main campus at Durham, NC, USA. The remaining three terms can be taken from a list of regions across the world and this residency would be divided between two cities. A minimum of ten years of work experience is required, the average being fifteen years. The GMAT score is not required.
3. NYU Stern executive MBA
This is a 22 month long programme that earns you the same MBA degree as a full-time MBA programme. It covers general management topics with a good choice of electives. The GMAT score is waived for qualifying candidates. However sponsorship from office is needed for the time taken away from work.
4. Smith Executive MBA
The University Of Maryland- Robert H. Smith School Of Business has its executive MBA programme lasting for 19 months. The average work experience is 15 year. Classes are held every other Friday or Saturday. Candidates are required to devote 21.5 hours in a week.
5. MIT Executive MBA
The MIT Sloan School of managements EMBA programme is a 20 month long general management programme. Classes are held once in three weeks with 26 such sessions on Fridays and Saturdays. Applicants need to have a minimum of ten years of work experience.
6. Oxford Executive MBA
The Said Business School offers the EMBA programme running in a week-long module throughout the entire duration of 21 months. The GMAT score may be waived for candidates with more than ten years of management experience at the discretion of the admissions committee, but those with lesser experience are required to submit the GMAT score.