Maths & numbers

Everyday percentages, sequences and the numbers in between.

Showing 241–253 of 253 tools

Convert whole numbers from 1 to 3999 to Roman numerals and validate canonical Roman notation.

Reduce an integer numerator and denominator to lowest terms while preserving the value and explaining the decimal form.

Convert an exact integer fraction to a terminating decimal or an explicitly marked recurring expansion.

Turn a finite decimal string into a power-of-ten fraction and reduce it without floating-point guessing.

Combine whole units and a fractional remainder with an explicit sign for the entire value.

Extract perfect square or cube factors from an integer and compare the exact radical with its real decimal approximation.

Explore fair coin and six-sided die events or supply equally likely favorable and total outcome counts.

Solve one unknown position in a/b = c/d and distinguish unique solutions from invalid or undetermined cases.

Practice finding an entered tax percentage and adding it to a price with the arithmetic shown.

Divide a polynomial by x minus c using exact rational coefficients and inspect every multiply-add step.

Find union intersection directional differences symmetric difference subset relations and schematic Venn-region counts.

Create a browser-local SVG pie chart with labeled categories percentage and angle calculations a data table and downloadable vector output.

Calculate an IPv4 network block mask address range binary representation and explicit host interpretation from a CIDR prefix or dotted mask.