Step Solver

Maths olympiad problems, taught one step at a time.

Every question in a TIMO Primary paper, worked out loud the Singapore way — bar models, units, part and whole. One click moves one step, so a six-year-old sets the pace and nobody skips to the answer.

Free while it is in beta. No adverts, no tracking, nothing to install — it runs in the browser and keeps working once the page has loaded.

Edward is 18 years old now, and Kenny will be 6 years old in 4 years. What is the difference between their ages?

Edward 18 Kenny 2 16 same length — so the gap is the difference
Question 1, TIMO Heat 2020–21 — one of 174 lessons

What it does

It teaches the method, then gets out of the way.

An answer key tells a child they were wrong. A worked step shows them where. Everything here is built around that difference.

Bar models that move

Each step draws itself — bars grow, split and line up — so the reasoning is something a child watches happen, not a diagram they have to decode.

Read aloud, every line

878 recorded lines of narration. A child who is still learning to read English can follow a whole paper without an adult sitting beside them.

Checked against the printed paper

Every answer is verified against the paper's own key, and the 24 questions that print a figure have that figure measured off the page, not guessed at.

How a lesson goes

Four minutes, and the child holds the remote.

The question, alone

A lesson opens on the question filling the screen at reading size, read aloud. Nothing else is on the page yet — there is nothing to skip ahead to.

One press, one step

Space bar, tap, or the big button. Each press adds exactly one move and says what it is doing. Going back is the same button in reverse.

The answer arrives last, in green

Green means the answer in every lesson, and it is used for nothing else — so a child learns to read the colour before they can read the words.

Then the next question, without leaving

The button becomes Next question, so a whole paper can be walked end to end. Coins are earned for solving it first, and halved for watching the solution — which keeps watching honest without making it forbidden.

What is in it today

Seven papers, finished — not a sample.

174questions, every one with a lesson
7papers: six TIMO heats and a practice set
878recorded lines of narration
0adverts, trackers, or third-party scripts in the app

Mini-games

For the younger ones, too

Casual one-tap games built on the same ideas — more and fewer, the first move of the whole method. Four worlds, no timer, nothing to lose.

Questions

The things parents ask first.

Who is it for?

Children of roughly six to nine sitting, or curious about, the TIMO Primary 1 papers. It was built for one seven-year-old and everything in it was tested on her first.

Does my child need an account?

No. You sign in, not them. Their name, their coins and which questions they have solved stay in the browser on your device and are never uploaded.

Why sign in at all, then?

So that the lessons stay with the people they were made for, and so there is a way to reach you when a paper is added. Signing in with Google means there is no new password to keep, and no password of yours for us to lose.

Does it work without internet?

The app does. Once a lesson has loaded it runs entirely in the browser — no server call between one step and the next. Signing in is the one part that needs a connection, and only the first time on a device.

Are the questions the real papers?

The questions are transcribed from the printed papers and each answer is checked against the paper's own key. The scanned papers themselves are not published here.

Start with question one.

Sign in with the Google account you already have. It takes one tap and there is nothing to install.