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Prime Number, Fibonaccis, Factorial, Equations, Proportion, Factors & Prime, Rational, Arithmetic & Geometric Sequnces, Polynomial, Permutation, Number, Binary etc.
Service Tax, EMI, Car Loan, Discount, Fix Deposit, Percentage, Mortgage, Loan, Lease, Return on investment, Present value, Future value, Annuity, Margin etc.
BMI, Bubble Level, Compass, Ruler, Date Difference, Speedometer, Step Counter, Shoes Size Measurement, Cooking Measurement, Ring Measurement, Wire Measurement, Password Creator, Cryptography, Protractor, Metal Detector, World Time, Morse Converter, RGB/HEX Color Converter, Case Converter, etc.