Blog · February 2026 · 5 min read

BJC Mathematics Without a Calculator: How to Practice

Q: Is a calculator allowed on BJC Mathematics?

No. BJC Mathematics is sat without a calculator on either paper. Every calculation, from fractions and percentages to consumer arithmetic, must be done in your head or on paper. This is one of the most important things to prepare for.

Q: How do I get better at mental maths for the BJC?

Practice a little every day rather than in long bursts. Drill times tables, adding and subtracting in columns, simplifying fractions, and finding percentages of amounts. The aim is for the arithmetic to become automatic, so that in the exam your attention goes to the problem, not to the sums.

Q: Which BJC topics need the most arithmetic?

Consumer mathematics questions such as simple interest, profit and loss, and hire purchase involve the most calculation, along with fractions, decimals, and percentages. These appear on every paper, so strong written arithmetic protects a large share of the marks.

The single fact that surprises the most BJC Mathematics candidates is that they cannot use a calculator on either paper. Students who rely on a phone for everyday sums walk into the exam and lose marks not because they do not understand the maths, but because they cannot do the arithmetic quickly on paper. This guide is about closing that gap.

Why the no-calculator rule matters so much

BJC Mathematics is sat entirely without a calculator. Every fraction you simplify, every percentage you find, and every interest calculation has to be done in your head or worked out on paper. This is not a small detail. A student who understands consumer mathematics perfectly but is slow and error-prone at long multiplication will still bleed marks, and will run short of time on the longer paper. The good news is that arithmetic speed is a trainable skill, and it is one of the highest-return things you can practice.

Put the calculator away now, not in May. If you practice with a calculator all year and only take it away in the final weeks, you are training the wrong habit until the last minute. Do your everyday maths homework on paper from today, and the exam condition stops being a shock.

The arithmetic to drill

Times tables, until they are instant and require no thought
Adding and subtracting in columns, carrying and borrowing cleanly
Long multiplication and short and long division
Simplifying fractions and converting between fractions, decimals, and percentages
Finding a percentage of an amount, and one amount as a percentage of another

These are the building blocks that consumer mathematics, ratio, and statistics questions all rest on. When they are automatic, your attention in the exam goes to solving the problem rather than to the sums inside it.

How to practice

Little and often. Ten focused minutes a day builds arithmetic faster than one long weekend session.
Work on paper, not in your head only. The exam wants to see method, so practice writing your steps neatly as you go.
Time yourself on past-paper questions. Speed under pressure is the real target, and only timed practice builds it.
Check by estimating. Before you write a final answer, ask whether it is roughly the right size. Estimation catches the careless slips that cost easy marks.

Practice BJC Mathematics the way you will sit it

Waypoint has BJC Mathematics practice across every strand, with worked steps, so you build both the method and the arithmetic speed the exam demands.

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Frequently asked

Is a calculator allowed on BJC Mathematics?

No. Both papers are sat without a calculator, so all arithmetic must be done in your head or on paper.

How do I get better at mental maths for the BJC?

Practice a little every day: times tables, column arithmetic, fractions, and percentages, until the sums become automatic.

Which BJC topics need the most arithmetic?

Consumer mathematics such as simple interest, profit and loss, and hire purchase, along with fractions, decimals, and percentages. They appear on every paper.

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