Dear aspirant hope you are doing well..

Top book are used for competitive exam are listed below.

• Quantitative Aptitude for Competitive Examinations ,Book by ABHIJIT GUHA and R.S. Aggarwal
• ARITHMETIC: SUBJECTIVE AND OBJECTIVE FOR COMPETITIVE EXAMINATIONS ,Book by R.S. Aggarwal
• Vedic Mathematics ,Book by Bharati Krishna Tirtha
• Objective Arithmetic: Numerical Ability Tests for Competitive Examinations ,Book by R.S. Aggarwal
• Quantitative Aptitude ,Book by R.S. Aggarwal

Hope it's helpful

Thank you........