THE e MATH : The Mental Calculator's Formula on Logarithm

Which is greater 13^89 or 14^87? Can you really guess the correct answer? No it is difficult. In competitive exams simplifications play a vital role. Logarithm is the only solution in some scenarios to arrive at accurate values in the shortest possible time. Any other method consumes more time and the correct answer may not arrive. In this book we learn to calculate logarithmic and anti-logarithmic values without calculator using a simple formula. The formula is pretty simple but one needs more and more practice of the complete book to achieve 99.9