Exercises
2,752 problems from open textbooks, each with the book's own worked solution. Work one out on paper, then open the solution a step at a time and mark how it went.
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Physics 486
Random problemFrom Physics and College Physics.
- Units and measurement15
- Motion in a straight line40
- Vectors and projectiles19
- Forces and Newton's laws20
- Circular motion and gravity18
- Work, energy and power16
- Momentum and collisions13
- Torque and rotation27
- Fluids24
- Heat and thermodynamics56
- Oscillations, waves and sound51
- Electric charge and fields28
- Current and circuits35
- Magnetism and induction25
- Light and optics43
- Relativity, quantum and nuclear56
Math 2,266
Random problemFrom Prealgebra, Elementary Algebra, Algebra and Trigonometry, and Precalculus.
- Numbers, fractions and percents458
- Expressions, exponents and radicals173
- Equations and inequalities184
- Word problems and geometry102
- Graphs and straight lines140
- Systems of equations121
- Polynomials and factoring430
- Roots and quadratic equations169
- Functions93
- Exponentials and logarithms75
- Trigonometry216
- Conic sections31
- Sequences, counting and probability45
- Limits and derivatives29
Where the problems come from
Every problem and solution is a worked example from an OpenStax textbook (Rice University): peer-reviewed books used in thousands of classrooms. We use the editions licensed CC BY 4.0, which anyone may reuse, and you can read them whole in our library. We split each solution into steps and kept the books' words, numbers and figures. Problems are in English. OpenStax doesn't endorse this site.