PrepSutra · Free · No account needed

Learn anything, one short topic at a time.

Short notes with key points, code and practice questions for tech interviews, school science and maths, Bihar exams, civics, English, life skills and careers. Plus one puzzle a day. In English, हिन्दी and मैथिली.

Today’s puzzle Browse all topics

✓ Free to learn✓ No account required↯ Works offline after first visit

71topics with notes, code and practice questions

9step-by-step roadmaps

53Challenge and Deep Dive puzzles

3languages: English, हिन्दी, मैथिली (draft)

ONE PUZZLE A DAY

Today's puzzle

One new Challenge or Deep Dive question every day. Think first, then lock in your answer.

LEARN ANYTHING · FREE

Topic library

Short notes with key points, worked examples and practice questions.

STEP BY STEP

Roadmaps

Follow a path of topics in order.

PLAY · NOTICE · TRY AGAIN

Games made for curious minds

Short rounds with hints and explanations. No leaderboard, ads, or sign-in.

⭐0Stars stay on this device

LEARN AT YOUR PACE

Small lessons, clear steps

Start with an idea, work through an example, then try it yourself.

BIHAR · सीखबाक बगिया

Stuck today? Take a breath. Start with one small challenge.

Learning can feel hard. Try one small step, ask a teacher or friend for help, or take a break and return later. Your value is never measured by a mark.

“Today’s small effort is tomorrow’s confidence.”— PrepSutra

“If I have seen further, it is by standing on the shoulders of giants.”— Isaac Newton Source ↗

“Nothing in life is to be feared, it is only to be understood. Now is the time to understand more, so that we may fear less.”— Marie Curie Source ↗

“Wonder is the feeling of a philosopher, and philosophy begins in wonder.”— Plato, Theaetetus Source ↗

BIHAR BOARD · MATHEMATICS

Paper questions, worked through

Selected questions with step-by-step study explanations. Source type is labelled clearly.

PrepSutra explanations are independent study help, not BSEB's official answer key.

FOR BIGGER QUESTIONS

How would you design it?

System design is a way to plan how people, information, and software pieces work together. No fancy words required. Begin with who needs help and what they need to do.

Explore the Tech Corner ↓

01 · Understand the person02 · Name the task03 · Sketch the simplest flow04 · Plan for weak internet05 · Improve from feedback

ABOUT PREPSUTRA

Every learner in Bihar deserves great teaching, free and in their own language.

PrepSutra is an early-stage startup working to put clear notes, a daily habit and a roadmap into every learner’s hands, on any phone and any connection.

Free to learn
In your own language
No ads, no tracking
Honest about what is reviewed

The problem

Good study notes are scattered, often behind fees, and mostly in English. Many learners in Bihar study on shared phones with weak data, and coaching is out of reach for many families. A student who is stuck in a topic often has nowhere to turn.

How we help

Short notes with key points, worked examples and practice questions across school subjects, exams, tech interviews and everyday skills.
Hindi and Maithili titles and puzzles, so learners can start in their own language. Maithili is a draft until a local speaker reviews it.
No sign-up, ads or tracking. Works offline after your first visit.
A daily puzzle and step-by-step roadmaps to build a study habit.

Where we are today

74topics

9roadmaps

53puzzles

1,00,000learners we aim to reach in year one

Our goal is to give free access to 1,00,000 learners across Bihar within our first year. That is a target we are working toward, not a number we have reached. We have not yet run a school or teacher pilot.

Where we are going

These are plans, not features available today.

Hindi and Maithili versions of every topic body, reviewed by teachers and fluent speakers.
More classes and exams: deeper JEE, NEET and BPSC material, and more Bihar content.
Downloadable offline packs for areas with poor connectivity.
Small pilots with local teachers and coaching centres, to learn what students actually need.
An optional study helper that answers a question from the note you are reading. Not available yet.

How we plan to sustain it

Core learning stays free. We plan to fund hosting and content review through optional supporter plans and partnerships. These are ideas only. No payments or partnerships are active today.

Get in touch

Found a mistake, want to review Maithili text, or teach and want to help? Write to us, or use the feedback box below.

ashwanijha@prepsutra.in

YOUR VOICE · प्रतिक्रिया

Help us build this with you.

Tell us what helped, what confused you, or what you want to learn next. Every message is read.

OPTIONAL · YOUR LEARNING STAYS OPEN

A self-paced learning garden

Core activities are free. Optional supporter prices are ideas only; payments are not connected.

Core lessons and games · ₹0

Games, lessons and selected paper walkthroughs.

₹0

Community supporter · ₹49/month (proposed)

Proposed way to help keep free learning available.

₹49 / month · proposed

Sponsor open learning · ₹199/month (proposed)

Proposed contribution toward access and local-language review.

₹199 / month · proposed

🌼

Every learner deserves room to grow.

One question, one idea, one day at a time.