There is no short cut to solve questions of Verbal Reasoning and quantitative mathematics. Here I am giving you some tips for better preparation of Verbal Reasoning and quantitative mathematics questions .

Reasoning and Quantitative Aptitude are the section that needs sufficient practice, you have to learn and Remember formulae and practice maximum questions possible.

Be attentive of details in Questions
Try to solve the easier questions first
DONOT assume, USE ONLY Info provided in the question
MAKE SURE you have read all the choices
Use process of elimination to save time while solving because the questions can be lengthy.

Remember all number properties, like divisibility rules, power series, number line etc. For better preparation You can purchase specialized books verbal reasoning questions from leading bookstores. You have to solve previous year question papers for Verbal Reasoning and quantitative mathematics

Some best books for prepatation :
Analytical Reasoning
By M K Pandey

Logical and Analytical Reasoning
By R. Gupta’s

A Modern Approach To Logical Reasoning
By R. S. Aggarwal

Analytical & Logical Reasoning For CAT
By Bs Sijwali

Non Verbal Reasoning
By R. S. Aggarwal

A Modern Approach To Verbal Reasoning
By R. S. Aggarwal

Data Interpretation and Logical Reasoning for the CAT (With CD)
By T. I. M. E.

Logical Reasoning For The CAT And Other MBA Examinations
By T. I. M. E.

Legal Aptitude and Legal Reasoning for the CLAT and LLB Examinations
By A P Bhardwaj

Quantitative Aptitude
By R. S. Aggarwal

Quantitative Aptitude For Competitive Examinations
By Abhijit Guha

The Pearson Guide To Quantitative Aptitude For The CAT
By Nishit K Sinha