About

Who makes this, and what to do if a solution looks wrong.

About MathBrush

MathBrush helps parents and children work through Singapore primary maths. Solutions show the steps, diagrams and reasoning behind each answer.

What is here

1026

questions, every one worked out and drawn step by step.

P1–P6

every primary year, following the MOE syllabus. The younger years take one skill at a time; P5 and P6 are mostly word problems.

19

problem patterns. Most P5 and P6 word problems use one of them, and knowing which is most of the battle.

No advertising.

How solutions are made

We use AI to create worked solutions, including bar models and other visual methods used in Singapore primary maths.

Before publication, each answer is independently recalculated and checked against the original question. These checks can catch errors, but they do not guarantee that every solution is correct.

How we check solutions →

Contact

If a solution looks wrong

The checks catch arithmetic and geometry. They cannot tell you whether the method is the one your child’s school teaches, or whether the explanation is the clearest one. Those are judgements.