Dear aspirant hope you are doing well..

To Increase Aptitude Solving Capabilities or Improve your Aptitude Skills?

• You must solve aptitude questions daily. ...
• Practice one kind of problems again and again to master them, first by yourself and then take help from the solution. ...
• Solve brain teasers and puzzles, it will help improve your logical skills.

For more details click on the link below

https://competition.careers360.com/articles/quantitative-aptitude/amp

Top book for improve aptitude skills are follow

• Quantitative Aptitude for Competitive Examinations - R.S. Aggarwal. ...
• The Pearson Guide To Quantitative Aptitude For Competitive Examination – Dinesh Khattar. ...
• Quantitative Aptitude Quantum CAT - Sarvesh K. ...
• Wiley's Quantitative Aptitude Book - P.A. ...
• Teach Yourself Quantitative Aptitude - Arun Sharma.

Hope it's helpful for you.

Thank you