Opposite English Language Usage, the ISEE follows national standards for mathematics within education. Both the **Quantitative Reasoning and Mathematics Achievement sections** test for core understanding within numbers and operations, algebra, geometry, measurement, data analysis and probability, and problem solving.

Similar to the Verbal Reasoning section, the Quantitative Reasoning section is broken down into two smaller categories: word problems and quantitative comparisons. While **the ISEE does not permit calculators at any point** in the test, the quantitative reasoning section relies heavily on number estimation and quick comparisons. While students may be given problems to evaluate, all operations will be possible without a calculator and necessary formulas and/or conversions provided within the context of the question. The quantitative comparisons will be a unique form of testing a student’s mathematical reasoning abilities. A student will be provided two values, labeled Column A and Column B, and will be asked to numerically compare them. Answer options A-D will always be the same in every question, and a sample question can be found below. The items within the Columns may require calculation, but a knowledge and understanding of core content at the minimum.

The Mathematics Achievement section will draw upon on the essential content in a standard format of presenting information or mathematical procedure and to select the correct answer. This section of the test may require more than quick and simple reasoning. While the calculator is still not allowed, students may be heavily tested on their calculation skills in this section when provided all necessary information and formulas.