This chapter provides complete solutions to Exercise 2.3 based on common logarithms (base 10). The notes explain how to find the characteristic and mantissa of a number, how to read logarithms from tables, and how to calculate antilogarithms accurately. Each question is solved step by step, helping students understand the logic behind characteristics for whole numbers and decimals, the use of mantissa values, and the correct placement of the decimal point in antilog results. The solutions are clear, well-structured, and ideal for building confidence in logarithm calculations.