Harran and Baghdad · 826-901
Thabit ibn Qurra
Thabit ibn Qurra was mathematician, translator, astronomer, and physician. He translated Greek mathematics and made original contributions to number theory, geometry, mechanics, and astronomy.
Biographical and historical reference works document Thabit ibn Qurra’s role and the mathematical work summarized on this page.
3-5, 6-8, 9-12, College
The person and the work
Biography
Thabit ibn Qurra was mathematician, translator, astronomer, and physician associated with Harran and Baghdad. He translated Greek mathematics and made original contributions to number theory, geometry, mechanics, and astronomy.
A theorem associated with him generates certain pairs of amicable numbers. Together, these contributions connect number sense, algebra and functions, and geometry and measurement to the working problems, tools, and questions of the period.
Mathematical contribution
What this hero added or preserved
Core mathematical work
He translated Greek mathematics and made original contributions to number theory, geometry, mechanics, and astronomy.
Method, teaching, or application
A theorem associated with him generates certain pairs of amicable numbers.
Why this matters
The larger lesson
Thabit ibn Qurra shows that mathematics grows through proof, calculation, observation, design, teaching, or careful records. The lasting lesson is that number sense, algebra and functions, and geometry and measurement can turn a difficult question into a method another person can inspect and reuse.
Place the work in time
Timeline
- 826
Life and working period
Thabit ibn Qurra worked as mathematician, translator, astronomer, and physician in Harran and Baghdad.
- Legacy
Lasting mathematical connection
A theorem associated with him generates certain pairs of amicable numbers.
Key idea
Numbers reveal structure
Thabit ibn Qurra’s story shows that numbers are not only labels. They can be classified, compared, decomposed, and arranged to reveal patterns.
When 646 is divided by 5, the quotient is 129 with remainder 1. That remainder is structural information, not a mistake.
Try it yourself
Find the quotient and remainder
Divide 646 by 5. State the quotient and remainder.
- Estimate how many full groups fit.
- Multiply the divisor by the quotient.
- Subtract to find the remainder.
Show the answer
646 = 5 × 129 + 1, so the quotient is 129 and the remainder is 1.
Math at work
Engineers and architects use the same habits
Engineers and architects use number sense to plan, compare, test, or communicate decisions. Thabit ibn Qurra’s work provides a historical example of that connection.
Keep curiosity alive
A little-known fact
A theorem associated with him generates certain pairs of amicable numbers.
Thabit ibn Qurra matters because of only one famous formula or anecdote.
The documented record is broader: He translated Greek mathematics and made original contributions to number theory, geometry, mechanics, and astronomy.
Keep exploring
Connected learning paths
Related math terms
- Place value
- Prime number
- Number pattern
- Variable
Practice these ideas
- AdditionPractice adding whole numbers, integers, and decimals.
- SubtractionPractice subtracting whole numbers, including results below zero.
- Pre-AlgebraBridge arithmetic and algebra with integers, ratios, and equations.
- Algebra IPractice equations, variables, functions, ratios, and inequalities.
- Algebra IIWork with quadratics, polynomials, systems, and sequences.