Rajasthan Police Constable and SI Exam Preparation App. 15000+ Question answer. Quantitative Aptitude. Numbers. H. C. F & l. C. M of Numbers. Decimal Fractions. Simplification. Square roots & Cube Roots. Average. Problems on Numbers. Problems on Ages. Surds & Indices. Percentage. Profit and Loss. Ratio and Proportion. Partnership. Chain Rule. Time and Work.