Donaldson R F Donaldson R F

Ruffini's Rule Calculator

Divide a polynomial by (x − r) using synthetic division, and see the quotient and remainder.

Example: 1, -6, 11, -6 means x³ − 6x² + 11x − 6

Citation Style Converter

Format one reference in APA, MLA, Chicago and ABNT side by side.

Open tool →

Printable Protractor & Ruler

Print a real-size protractor or ruler (cm and inches) on A4 or Letter paper.

Open tool →

Lined Paper Generator

Print lined paper with any line spacing, with a margin, dotted or handwriting practice lines, on A4 or US Letter.

Open tool →

Times Table Generator

Print times table charts and multiplication worksheets with answer sheets, or practise with a quick on-screen quiz.

Open tool →

Prime Factorization Calculator

Break any whole number into prime factors with a factor tree and division ladder, plus its divisors and sum of divisors.

Open tool →

Long Division Calculator

Divide step by step with the UK bus stop method, with the quotient, remainder and decimals, including decimal numbers.

Open tool →
Running into a technical issue or something that doesn't work right on this page? Please let us know straight away via our Contact page — that's how we find out what's broken and get it fixed.