Hard math problems with answers

Generate hard math problems with an answer key on a separate page. Ask for worked solutions to support self-study, enrichment, and contest practice.

Free · No account · Up to 40 problems · Answer key included

Tip: Describe the specific skill or topic. The generator calibrates complexity to the grade level you pick.

GradeWithAI is used by 21,000+ teachers, including teachers at

How to study hard problems with an answer key

Hard math problems with answers are challenging problems paired with an answer key, so students can check their own work in self-study. This generator prints the answers on a separate page; ask for 'worked solutions in the answer key' to get the steps too. Check the key first, since generated solutions can contain mistakes.

Why worked solutions help

Comparing an attempt with a worked solution shows where the reasoning went off track. Example: how many positive integers below 100 are divisible by 3 or 5? By inclusion-exclusion, 33 + 19 − 6 = 46. Ask for solutions that:

  • Name the method used

  • Show the key step that makes the problem workable

  • Write out the computation step by step

  • Check the answer against the original question

How to use an answer key for self-study

Have students attempt each problem for a set time before looking. If they solve it, they still read the solution for a shorter route. If stuck, they read only the first line and try again.

Building a problem notebook

Many contest students keep a notebook of missed problems, sorted by topic and level, and retry them a month later. Printed sets with answer keys fit that habit.

How the math problem generator works

  1. 1

    Describe the set

    The topic and the format, such as two-step equations or fraction word problems about cooking.

  2. 2

    Set the details

    Grade, difficulty, and number of problems. It usually takes 10 to 20 seconds.

  3. 3

    Check and print

    Work a few problems yourself, then print the student copy and the answer key.

What teachers say

Teachers across subjects, from AP history to astrophysics, on grading with GradeWithAI.

“I've really enjoyed using the GradeWithAI program. It saves me a ton of time, especially when I have class sizes of 35 or 36 students times five.”
Rebecca Ford
Rebecca Ford
Astrophysics
“GradeWithAI doesn't just grade. It gives the student reasoning as to why every point is awarded or not awarded. That is a very valuable thing for the students.”
Ken Brenan
Ken Brenan
Computer Science
“More impressive though is that it corrects student answers not simply using a pre-written answer, but by following the thought process they've pursued.”
Aaron Braskin
Aaron Braskin
T&E Department Head
“For Chadwick users, GradeWithAI has improved feedback efficiency and effectiveness, as it is grounded in existing platforms and is highly adaptable.”
Erin Nordlund
Erin Nordlund
Director of Teaching and Learning
“GradeWithAI [provides] students with timely individualized feedback on their homework assignments and formative assessments. This is a job that is virtually impossible for a teacher to do on a regular basis.”
Jason Robertson
Jason Robertson
AP Calculus
“Students have also appreciated the consistency and immediacy of the feedback I can provide through GradeWithAI. This has enabled them to make necessary corrections and achieve their desired scores on any assignment.”
Freddy Polanco
Freddy Polanco
AP US History

Grading the completed problem sets?

GradeWithAI reads handwritten math from scans or phone photos and gives partial credit under your rubric or answer key. You review each score before it posts.

Grading the completed math work? See how the AI math grader gives partial credit

GradeWithAI grading a handwritten Algebra II quiz with partial credit, showing the scanned student work next to step-by-step AI feedback

Math problem generator FAQ

Questions about this tool? Email john@gradewithai.com.

Name the level in the description: AMC 8 or MATHCOUNTS style for strong middle schoolers, AMC 10 or AMC 12 style for high school, or 'challenging honors problems' for a class. Choose the closest grade in the form.

Whoever you write the request for. Ask for 'solutions a 7th grader can follow' or 'brief solutions for a teacher' and the answer key follows that style.

Yes, as a separate step. Upload scans or photos of the work to GradeWithAI with your answer key or rubric. It reads handwritten solutions and gives partial credit under your rubric, and you review every score before it goes back. Grading needs a free account; the free plan grades 25 submissions every 30 days.

Addition, subtraction, multiplication, division (including long division), fractions, decimals, ratios, percents, pre-algebra, Algebra 1 and 2, and geometry.

Yes. Ask for word problems in the description, and add a context such as sports, animals, or food if you like.

Pick the grade, which sets the kind of numbers and operations, then choose easy, medium, or hard.

Yes. Every problem has an answer, printed on a separate page. Work a few problems yourself before handing the set out, since AI-generated math can contain mistakes.

No. It writes problems. To grade completed work, upload it to GradeWithAI, which reads handwritten math and gives partial credit under your rubric or answer key.

Yes, with no account.

Grade the completed math work

21,000+ teachers use GradeWithAI to grade essays, tests, and handwritten work, and report saving 10+ hours a week.

The free plan grades 25 submissions every 30 days. No credit card.

10+hours saved per week

Reported by teachers using GradeWithAI, with feedback on every submission they grade.

  • Erin Nordlund
  • Rebecca Ford
  • Ken Brenan
Teachers at 1000+ schools