Inserting the missing character / number

Inserting the missing character or number is not a separate outside chapter in the 2026 CET Graduation syllabus; it must be taught through the listed bullets of number series, alphabet series, clock, calendar, and mental and analytical ability. The first task is therefore to identify the form of the blank. If the blank is in a line of numbers, test arithmetic change, multiplication, powers, alternating operations, or paired positions. If the blank is in letters, convert each letter to its alphabet position and then check whether the movement is forward, backward, alternate, paired, or grouped. If the blank sits in a small number table, compare rows, columns, diagonals, corners, and centre values only as number relations. Do not import unlisted legacy reasoning formats into this topic; keep every example tied to number series, alphabet series, clock, calendar, or analytical number relations. The exam-ready method has four steps: write the visible terms, mark their positions, propose one rule, and verify the rule on every given part before selecting the missing value. A rule that explains only the first half of the question is not enough. CET distractors are usually made by using the right operation in the wrong place or by stopping one step early, so the final check matters as much as discovering the pattern. This topic rewards patient consistency: one rule, full coverage, then answer.