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formulas for 2D Mensuration, including area and perimeter for rectangles, squares, triangles (Heron's Formula), parallelograms, circles, and trapeziums. It features extensive reference tables for Square Numbers and Cube Numbers from 1 to 100. The text defines various number systems: Natural Numbers: Counting numbers starting from 1. Whole Numbers: Numbers starting from 0. Composite Numbers: Numbers with more than two factors. Even/Odd Numbers: Lists of these categories up to 100. Additionally, it covers Percentages (fraction conversions) and Algebraic Identities, such as basic squares, cubes of binomials, and sum/difference of cubes. English Grammar: Tenses The English section defines Tense as the time of an action. It breaks down the three primary types—Present, Past, and Future—noting that each has four forms: Simple, Continuous, Perfect, and Perfect Continuous.