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Free Formula pdf : Formula book for quick reference. This pdf contains all important formulas of Aptitude and very handy.   It is optimized to take a print on A4 sheet (Page 1 to 14) or you can simply save on your desktop for future reference. Click Here to download. 

Ratio and Proportion (ERPV)
Averages, Mixtures and Alligations (AMA)
Percentages, Profit and Loss, Interests (PPLI)
Number System (NS)
Time and Work, Pipes, Time and Distance (Rate)
Areas and Volumes (Mensuration)
Permutations and Combinations, Probabibility (PCP)

Important Algebra and Geometry Topics

High level articles for CAT, Elitmus, GMAT etc

Quantitative aptitude questions with answers and explanations for Common Aptitude Test (CAT),MAT, GMAT, IBPS Exam, GRE, CSAT, CLAT , RRB, Bank PO and Clerk Exams, ICET, UPSC Competitive Exams, CLAT, SSC, SNAP Test, KPSC, XAT, GRE, Defense Competitive Exams, L.I.C/ G. I.C Competitive Exams , Railway Competitive Exam, TNPSC, University Grants Commission (UGC), Elitmus, Cocube, Amcat and Government Exams.