Free GAMSAT S3 practice - beta

GAMSAT Section 3 practice, free

Reasoning in Biological and Physical Sciences: biology, general and organic chemistry, physics, and the maths that ties them together. Every question hands you the law, formula or data you need, then tests whether you can reason with it, the way the real Section 3 does.

Heads up: this tool is brand new, completely free, and almost certainly a little rough around the edges. Section 3 rewards working from the information given rather than recalling facts, so read each stimulus carefully, then check your reasoning against the worked explanation. No charge, no catch, just practice.

One honest aside: these tools have been built quietly in the background for months, with genuine blood, sweat and tears behind them. They are exhausting to make and still maturing, so if you run into an error, please be patient and bear with me. I am fixing things as I find them.

Free GAMSAT Section 3 practice that rewards reasoning, not cramming

This tool drills GAMSAT Section 3 across biology, general and organic chemistry, physics, and the core maths skills underneath them all, with instant scoring and a breakdown by topic. It is free while in beta. Here is what Section 3 really asks of you and how to train for it.

What Section 3 actually tests

Section 3, "Reasoning in Biological and Physical Sciences", is the largest section: around 75 questions in roughly 150 minutes, about two minutes each. The knowledge assumed is first-year university biology and chemistry and Year 12 physics, weighted roughly 40% biology, 40% chemistry and 20% physics. But the crucial point is that it is a reasoning test. Most stems hand you the law, formula, data table or experiment you need, then ask you to apply it under time pressure. Recall alone rarely earns the mark.

The maths underneath everything

A large share of Section 3 marks ride on quick, accurate calculation done without a calculator: scientific notation, powers and logarithms, ratios and proportion, unit conversion, rearranging formulae and estimation. Shaky arithmetic quietly bleeds marks across every subject, which is why this tool includes a dedicated Maths and data skills set. Get those automatic and the science gets noticeably easier.

How to practise Section 3

Treat every stem as comprehension first: pull out the rule, formula or data you are given, then apply it. The information you need is usually right there.
Drill the maths until it is automatic. Fast, accurate calculation frees up attention for the actual reasoning.
With a data table, work out what each variable does and how they relate before you look at the options.
Learn the high-yield frameworks (Le Chatelier, the kinematics equations, acid-base and pH, oxidation level, simple proportionality) so you recognise them on sight.
Build estimation so you can eliminate any option that is the wrong order of magnitude in seconds.

Common Section 3 mistakes to avoid

Trying to recall content instead of reasoning from the stimulus the question has already given you.

Reaching for full calculation when an estimate would rule out three options and save a minute.

Slipping on units and powers of ten. It is the most common and most expensive error in the whole section.

Answering the question you expected after a dense stem instead of the one actually asked.

How to use this tool

Filter by subject to target biology, chemistry or physics, or pick Maths and data skills to sharpen the arithmetic everything else depends on.
Work the stimulus before the options, then check your reasoning against the worked explanation.
Once accurate, add the clock and hold your pace to about two minutes per question.

Pick a subject and start practising

GAMSAT Section 3 practice FAQ

Is GAMSAT Section 3 a memory test?

No. It is mostly reasoning from information the question supplies. Stems typically give you the law, formula or data, then test whether you can apply it. Background knowledge helps, but recall alone rarely earns the mark.

What level of science do I need?

First-year university biology and chemistry, and Year 12 (A-level equivalent) physics. The depth is modest; the reasoning and the speed are the real challenge.

How many questions are in this tool?

There are 64 original questions across biology, general and organic chemistry, physics, and a dedicated Maths and data skills set of 14 pure-skill questions.

Are these real GAMSAT questions?

No. Every question is original and text, data or equation based, written to mirror the reasoning style of Section 3. Nothing is copied, and every calculation has been checked.

Do I need a strong maths background?

You need confident school-level maths done quickly and without a calculator. This tool includes a maths-skills set precisely so you can build that speed.

How is Section 3 weighted across subjects?

Roughly 40% biology, 40% chemistry (general and organic combined) and 20% physics, with quantitative reasoning threaded through all three.

More free Key2MD tools: GAMSAT Section 1 practice, GAMSAT Section 2 essay practice, UCAT practice and the full admissions guide.