Odd or Even: Interactive Integer Parity with Conditional Logic

This GeoGebra example randomly generates integers and asks learners to decide whether each number is odd or even, then immediately displays the relevant set membership and feedback. It highlights the observable phenomenon of parity: every integer belongs to either the odd set or the even set. Key math concepts include integer parity, the odd/even partition of integers, and the divisibility-by-2 idea expressed through conditional logic. Construction details: Shuffle and Random are used to select values among objects a, b, c, d, e, f; If provides branching to test the parity condition; Element is used to extract the matching object (evenelement or oddelement) from evenset and oddset. Interactive elements such as button1, whichiseven, whichisodd, together with question text and options (opt1–opt4), drive the user’s choice, while correctans and feedbackvisible control whether the correct answer and feedback text (e.g., text1–text6) are shown. Best suited for elementary to early secondary education, or for classroom practice and quick formative assessment on parity and divisibility.