Compound Interest Quiz: How Interest Rate and Time Shape Present/Final Value

This example demonstrates an interactive “compound interest quiz” where the user’s inputs are checked against the compound-interest computation for present value and future value. It highlights the relationship between interest rate, number of periods, and the resulting terminal amount—mirroring the geometric (multiplicative) behavior typical of sequences. Key concepts include compound interest formulas, arithmetic operations organized around parameters, and verification logic for correctness. Construction-wise, it uses GeoGebra commands such as If (branching for feedback), Textfield (user inputs for answers/parameters), Random and RandomElement (randomly generating quiz parameters and/or choice options), and AreEqual (comparing computed results with the user’s answer). The listed objects (e.g., validation/check flags, question/option texts, and computed variables for investment/debt, rates, and period counts) collectively form the quiz interface and answer-check workflow. Suitable for secondary students and introductory college learners studying sequences/series and financial mathematics, especially for interactive practice and formative assessment.