This Is Mathematics Book of Pointes 1. Algebra 2.Logarithms 3. Trigonometry 4. mensuration 5. Coordinate Geometry 6. Vectors 7. Three Dimensional Geometry ( Line and Plane ) 8. Calculus 9. Probability Distribution Log table (logarithm table) is used in performing bigger calculations (of multiplication, division, squares, and roots) without using a calculator. The logarithm of a number to a given base is the exponent by which that base should be raised to give the original number. For example, if log?16 = x then 2x = 16 and x = 4 satisfies this equation. So log? 16 = 4. But what about log? 15? If we assume log? 15 = x then we get 2x = 15 and we cannot find the value of x manually here. Log table helps us in finding the value of log? 15. In this article, we will learn how to use a logarithm table. Let us see how to find the logarithm of a number using a log table and how to use logs in performing the calculations along with many more examples.