This document discusses different types of coding and decoding questions in verbal reasoning tests. It describes letter coding, number coding, position coding, direct coding, and substitution coding. For letter coding, the logic is to write the letters and codes in parallel columns to find patterns like a consistent increase or decrease in letter positions. For other types, the key is to understand the given coding logic or pattern and apply it systematically to deduce the code for new words based on the information provided in examples. Understanding different coding techniques helps solve these questions accurately and efficiently.