Practice that actually raises your marks

You solve twenty questions on a Sunday and most of them come out right. Then the real paper comes and your marks sit exactly where they were. The effort was real. The practice was not.

Practice only works when you do not know the answer while you are solving. This lesson shows you how to keep that true, for SSC, Railway, banking and board maths.

Which topics to practise first

Most of the maths marks in SSC, Railway and banking papers sit in a small group of topics. Learn this group before anything else.

• percentage
• profit and loss
• ratio
• time and work

Then these four.

• time and distance
• simple and compound interest
• averages
• mensuration

Percentage sits under most of the others. Profit and loss is a percentage of cost price. Interest is a percentage that repeats. Fix percentage first and four topics get easier at once.

Class 10 board maths covers several of these too. So an hour spent here pays you twice.

Now pick the topic you are worst at. Not the one you enjoy. Your weakest topic is where the cheap marks are hiding.

If you do not know which one is weakest, take your last ten wrong answers. Sort them into piles by topic. The tallest pile is your answer.

The prompt that keeps the answers hidden

If the answers arrive with the questions, your eye will read them. Then you work backwards from the answer and feel clever. That feeling is exactly the danger in the answer machine trap.

So ask like this. Change the topic and the exam name to yours.

Give me 5 questions on time and work at SSC CGL Tier 1 level.
Questions only. No answers. No hints. No working.
Then stop and wait for my five answers.
After I send them, mark them one by one and give me my score.
Show every step of your working when you mark.
Then tell me the one thing I should revise first.
Answer in English. Use rupees and Indian names.

Now put the phone down and solve on paper. Send all five answers in one message. Only then does the marking arrive.

Two small rules about language make this work better. First, ask in English, even when you want the explanation in Hindi. Researchers tested real UPSC, JEE and NEET questions in both languages in February 2026. Accuracy dropped in Hindi.

Second, keep one language per prompt. Do not mix the two inside one message when the answer must be correct. Using AI in Hindi shows you where mixing is safe.

There is a third rule for the marking itself. Always ask it to solve step by step and show every step. Tested on real exam questions, that instruction raises its accuracy. A model that shows its steps also gives you something you can check.

Check its marking before you believe it

The app can mark a right answer wrong. It can also mark a wrong answer right. So check the marking the way you would check a friend’s rough work.

Take compound interest, a favourite of bank and SSC papers.

“Find the compound interest on Rs 10,000 at 10 percent per year for 2 years.”

Do it year by year yourself. Year 1 interest is Rs 1,000, so the amount becomes Rs 11,000. Year 2 interest is 10 percent of Rs 11,000, which is Rs 1,100. The amount becomes Rs 12,100, so the compound interest is Rs 2,100.

Then make the app show the same thing two ways.

Solve this year by year, not with the formula.
Show the amount at the end of each year.
Then solve it again using the formula.
Tell me whether the two answers match.

Two methods that agree is your proof. If they disagree, one of them is wrong, and you found that out in ten seconds.

Time and work has the same test. Take this one. A can finish a work in 12 days. B can finish it in 18 days. How many days together?

Solve it in units. The LCM of 12 and 18 is 36. So A does 3 units a day and B does 2. Together that is 5 units a day, and 36 divided by 5 is 7.2 days. Now solve it again as fractions. One twelfth plus one eighteenth is five thirty-sixths. Same answer.

Mensuration hides a different trap, and it is not in the number.

“Find the total surface area of a cylinder with radius 7 cm and height 10 cm.”

Use pi as 22/7, the way the NCERT book does. Do not use 3.14159.
Give me the curved surface and the two circle faces separately.
Then add them.
Write the unit on every single line.

The curved surface comes to 440. The two circle ends add 308. The total is 748.

Every one of those numbers is in square centimetres. An area written in cm is wrong, however neat the working above it looks. That one unit check saves more marks than any new formula.

More checks you can do with no tool at all are in seven ways to check a maths answer. Why the arithmetic slips in the first place is in why it gets sums wrong.

Write down the type of mistake, not the mistake

This is the step almost nobody does, and it is where the marks are.

After the marking, ask this for every wrong question.

I answered Rs 2,200. The correct answer is Rs 2,100.
Do not show me the full solution again.
Tell me what TYPE of mistake I probably made.
For example a formula mistake, a unit mistake, a sign mistake,
or a careless calculation.
Then give me 3 more questions that test the same mistake.
Questions only, no answers.

Now open your notes app. Make one page called “my mistake types”. Write one line after every session, with the date and the type.

Give it two weeks and the list stops growing. Most learners repeat about three types of mistake forever, and those same three cost them marks in every paper. Naming them is what stops them. Solving another hundred random questions does not.

Practise against the clock

A correct answer that takes you four minutes can still lose you the mark, because the paper is timed. Speed is a separate skill, so it needs separate practice.

Give me 10 questions on percentage at SSC CGL Tier 1 level.
Questions only, no answers.
Before I start, give me a time limit in seconds for each question.
I will send my answers with the time I took on each one.
Then mark them, and tell me which ones I was too slow on.

Use your phone timer. Write the seconds beside each answer as you go.

The time limit the app suggests is only a rough guide. Work out the real one yourself. Take the total time and the total number of questions from the official notification, and divide.

One plan, then get to work

You can ask for a study plan, and you should ask exactly once.

My exam is in 30 days.
I get 1 hour on weekdays and 3 hours on Sunday.
I am weakest at time and work, and at averages.
Make me a 30 day plan as a table.
Columns: day, topic, number of questions, revision.
Put one revision day every week.
Keep the last three days for revision only.
Do not give me more work than the hours I told you.

A good reply starts something like this.

Now the warning. Making plans feels like studying. It is not studying. Screenshot the table, close the chat, and solve day 1 today.

A rough plan you follow for thirty days beats a beautiful plan you rewrite every Sunday. Ask for a new plan only when the old one is finished, or when your hours truly change.

Keep the dose honest too. In Ghana, about a thousand school students used a maths tutor on WhatsApp, two half hour sessions a week for eight months. Their maths improved by roughly as much as a good human tutor gives. Hours are what move marks. Stopping after three days is the real enemy, not the app you picked.

What it cannot tell you about your exam

Your AI does not know this year’s exam pattern. It does not know the number of questions, the marking scheme, the negative marking rule or the date. It will answer anyway, and it will sound completely sure.

Anything that depends on when is the wrong question for this tool. One audit in 2025 found leading chatbots repeated false claims in about a third of their answers on news style questions. An old exam pattern from three years ago sits in its memory and comes out as today’s truth.

The same goes for the answer key after the exam. Only the official key settles a disputed question. On Indian exam formats and Indian details it is weaker than you expect, and why it is weaker on Indian questions explains that fully.

So use it for the three things it is genuinely good at. Endless questions at your level, honest marking of work you did yourself, and a name for the mistake you keep repeating. The rest of your exam preparation is in preparing for a government exam. The next lesson carries these same habits into learning physics with AI, where units matter even more than they do here.