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TARA Problem Solving: the 3 question types & maths skills you actually need

What Problem Solving actually tests, why Oxford and UCL bother testing for it, all 3 question types with worked examples, the maths skills the official appendix actually covers, how the module is timed, and what counts as a good score.

By the GhostPrep teamLast updated

Written by the specialists behind our practice bank — over a decade writing, teaching and tracking the UK admissions tests.

What is Problem Solving, actually?

Every Problem Solving question hands you a small, self-contained scenario — a handful of numbers, a short description of a situation, sometimes a simple table — and asks you to work out something specific from it.

There's no formula to revise in advance and no subject content to learn: the arithmetic involved rarely goes beyond what's covered by the middle of secondary school, and often sits well below it.

What's actually being measured is whether you can take a problem you've never seen before, work out which numbers in front of you actually matter, choose the right operations, and carry them through accurately under time pressure.

That's a deliberately different thing from a maths exam. A maths exam usually rewards knowing a method in advance and applying it correctly.

Problem Solving gives you no advance warning of the method at all — each question is built to feel unfamiliar, so the only way through is to reason out, from scratch, what the problem is actually asking and how the numbers you've been given connect to it.

The maths itself, in isolation, is basic. The reasoning about which basic maths to use, and in what order, is the actual skill on the table.

First glance at the maths appendix
Animated character exhaling in relief, tension leaving their shoulders
Most candidates brace for something closer to A-level content. It's GCSE arithmetic done without a calculator — the hard part is deciding which numbers to use, not doing the sum itself.

That distinction matters for how you prepare. Drilling harder maths content won't move your score much, because the module was never testing harder content to begin with.

What helps is practicing the specific reasoning patterns TARA uses — which is exactly what the 3 named question types further down this page are. You can start working through the practice bank free before you decide whether to go further.

Why universities test for it

Courses like Economics and Management, Mechanical Engineering, or Management Science attract applicants with strong grades across the board — that's the entry price, not the differentiator.

What predicted grades struggle to show is something more specific: can this candidate look at an unfamiliar set of numbers or data and work out what's relevant, choose a sensible method, and reach a correct answer without being talked through it first.

That's closer to what a first-year problem set, a lab report, or a live case study actually demands than any single A-level paper is designed to test.

Because Problem Solving doesn't test subject content, it can't be crammed the way A-level material can, and a strong performance doesn't automatically track with strong maths grades either — which is exactly why it's used as an additional, separate signal rather than a substitute for the rest of an application.

Which courses require it, and how heavily each department weighs it, varies by university and can shift between admissions cycles, so it's worth checking your specific course's page directly rather than assuming — Oxford confirms its own course list on its official admissions tests page, and UCL does the same on its tests, tasks and interviews page.

Why it matters beyond the exam

The reason universities bother testing this at all is that the skill doesn't stop being useful once you have an offer.

A first-year engineering problem set, an economics dataset, a lab report with a results table, or a business case study all hand you more information than you actually need, and expect you to work out which parts matter before you can even start calculating.

Filtering signal from noise in a pile of numbers is a skill in its own right, not a side effect of already being good at maths.

It shows up constantly outside a degree too — reading a phone contract, comparing two job offers built on different pay structures, working out whether "buy five, get one free" actually beats a straight percentage discount.

None of that requires maths beyond what Problem Solving already tests. It requires noticing which numbers you've actually been given answer the question in front of you, and which ones are just there.

How the module works, and how it's timed

Problem Solving is 22 multiple-choice questions in 40 minutes — the same format as Critical Thinking, five options each with one correct answer, and no penalty for a wrong guess, as set out on UAT-UK's own TARA page.

That works out to the same average of just under one minute fifty seconds per question.

A question with one short calculation and no distracting extra data can take a fraction of that once you've had some practice; a Finding Procedures question with several steps and a table to read can easily take two or three times as long.

Budget flexibly across the module rather than pacing every question identically, and if time is running out, guess rather than leave a question blank — there's nothing to lose.

For how this timing fits alongside Critical Thinking and the Writing Task, see the full format and timing breakdown in our complete guide.

One rule catches people out more than any other: calculators and dictionaries are banned throughout the entire test, not just in the Writing Task. Every calculation in Problem Solving has to be done by hand, in your head or on paper.

That's precisely why the maths skills covered below stay deliberately basic — the module is built to be solvable with mental arithmetic and simple written working.

Practicing with a calculator to hand teaches you nothing about doing the same calculation without one on the day, so if you've been reaching for one while revising, that's worth changing before test day rather than after it.

Where it comes from: the TSA connection

Like Critical Thinking, Problem Solving isn't a new invention.

Oxford and UCL's previous test, the Thinking Skills Assessment (TSA), used the same three question type names — Relevant Selection, Finding Procedures, Identifying Similarity — and a near-identical maths appendix, taught through much the same style of worked example.

When TSA was discontinued and UAT-UK introduced TARA for 2026/27 entry, this part of the test carried across largely intact — a transition confirmed by Cambridge Assessment's own closure notice for its admissions testing service, which set the move to UAT-UK in motion.

What did change is the administration format. Standard TSA put all 50 questions — 25 Problem Solving and 25 Critical Thinking — into a single 90-minute sitting, interleaved together and presented roughly in order of difficulty.

TARA separates the two completely:

Problem Solving is its own standalone, 22-question, 40-minute module, sat on its own rather than mixed in with Critical Thinking questions.

So if you're working from older TSA Problem Solving material, the question types and the maths behind them are still directly useful — just don't practice switching between the two skills mid-timer, because that's not how TARA is actually run.

See our full TSA vs TARA guide for the rest of the detail.

What's a good Problem Solving score?

TARA scores Problem Solving on its own scale from 1.0 to 9.0, reported separately from Critical Thinking.

UAT-UK has stated on its own TARA page that the scale is designed so a typical candidate scores around 4.5, and that roughly the top 10% of candidates score above 7.0 — the same two figures that apply to Critical Thinking, since both modules share the same scoring design.

Scores are capped at 1.0 on the low end and 9.0 on the high end.

Published score histograms suggest Problem Solving results tend to sit a little higher than Critical Thinking's, clustering somewhere around 4.5 to 5.5 rather than lower down the scale — but that's a visual read of a published chart rather than an exact figure UAT-UK has stated in text, so treat it as a rough shape rather than a number to plan around.

The two solid figures worth remembering are the ones above: a typical score around 4.5, and the top 10% of candidates sitting above 7.0.

Because the two modules are scored and reported separately, it's entirely normal to do noticeably better on one than the other, and universities that use TARA can see both individually rather than a single blended figure.

For the full breakdown of both modules across the October 2025 and January 2026 sittings, see our TARA scoring guide.

Here's where the key numbers sit:

The TARA score scale
Critical Thinking and Problem Solving are each reported separately on this scale.
1.0
9.0
4.5
Typical candidate
7.0
Top 10% score above this

The maths skills checklist, from the official appendix

TARA's own Content Specification includes an appendix listing exactly which maths skills Problem Solving draws on, and it's a shorter, more basic list than most candidates expect walking in. Work through it honestly before test day.

If a line makes you pause, that's worth ten minutes of mental arithmetic practice now, done without a calculator, rather than finding out under a 40-minute clock.

Here's the full list:

Number and fractions
  • Simple fractions — finding a fraction of an amount, and comparing the size of two fractions.
  • Place value — reading, comparing and ordering numbers correctly, including decimals.
  • The four rules of number — addition, subtraction, multiplication and division, including with decimals, carried out without a calculator.
  • Percentages and percentage operations — finding a percentage of an amount, and working out a percentage increase or decrease.
Averages
  • Calculating an average (the mean) from a small set of figures.
Time, money and measures
  • Time, money and everyday measures — working out durations, totals, change and unit costs.
  • Metric unit relationships — 1km = 1000m, 1m = 100cm, 1cm = 10mm, 1kg = 1000g. Imperial conversions (miles, pounds, ounces) are not part of the official appendix, so there's no need to spend revision time on them.
Shape calculations
  • Area, perimeter and volume of a rectangle or a box only.

Narrower than a full geometry syllabus — no other shapes are named in the appendix.

Reading data
  • Reading and extracting information from graphs, charts and tables — this is less about calculation and more about not misreading an axis, a label, or a row under time pressure.

If you worked through that list without needing to double back, the maths itself isn't your limiting factor — put your practice time into the reasoning patterns covered in the 3 question types below instead.

If a couple of lines did catch you out, five or ten minutes of deliberate practice on just those operations, done without a calculator, is a better use of prep time than working through full past papers you can't yet do by hand.

There's no official past-paper archive to draw on yet either — see our honest note on what Problem Solving practice material actually exists before test day.

If you'd rather see the reasoning in action than read about it, you can register free and try a real question yourself right now.

Spotting the decoy row before you calculate anything
Animated character pointing and smiling, catching something others missed
Every one of the 3 worked examples below has at least one number that looks useful and isn't. Catching it before you start crunching is most of the skill — the arithmetic after that is the easy part.

Before you dive into the worked examples, it helps to see how Problem Solving sits alongside Critical Thinking and the Writing Task — see the module-by-module breakdown in our complete guide, or jump straight in below.

The 3 question types, with worked examples

Each question below is a real question from our practice bank, worked through step by step so you can see the reasoning in full rather than just read a description of it. Have a go before you reveal the answer.

Question type 1 of 3Practice bank · ID 1338

Relevant Selection

What it tests: Work out which pieces of information you're given are actually needed to answer the question, and discard the rest.

Approach: Before you touch a single number, restate in your own words exactly what quantity the question wants, and list every constraint in the prose separately from the table — a row that looks best on paper is worthless if it fails a written rule.

Step by step
  1. Identify precisely what the question is asking you to calculate.
  2. Apply every prose constraint first, eliminating any row that fails one, no matter how good its figures look.
  3. Only then build the calculation from the columns the question actually needs — other columns in the table may be genuine, consistent data that simply plays no part in this comparison.
  4. Solve using only the rows and columns that survive both tests, and double-check you haven't inverted a ratio.

Common trap: the two best-looking raw numbers in the table both fail a constraint stated only in the prose — one on product type, one on weight — so a solver who compares every row on value alone, without applying the written rules first, lands on the wrong answer even with correct arithmetic.

Scenario

"Active nutrient content" is the proportion of the bag's weight that is usable plant nutrient (the rest is bulking material).

BrandTypeBag weight (kg)Active nutrient contentPriceCoverage area (m²)Shelf life (months)
GreenGroSlow-release2015%£154024
EarthBoostQuick-release2022%£204518
TomatoFeedSlow-release1822%£204224
RootMaxSlow-release2420%£205036
BloomRichSlow-release1615%£163512
PetalPlusSlow-release1414%£103024

Nasrin will buy just one bag this season. Tomato plants need a slow-release feed — a quick-release feed would scorch their roots. Her garden shed has one shelf for storing an opened bag, and it cannot hold anything heavier than 20 kg. Using the table, which bag gives her the most active nutrient (in kg) per pound spent, among those that meet BOTH of her requirements?

ABloomRich
BGreenGro
CEarthBoost
DRootMax
ETomatoFeed
Reveal the correct answer & explanation

Correct answer: B

First scope the table down using the two prose constraints: EarthBoost is quick-release (unsuitable for tomatoes), and RootMax weighs 24kg (over the shed's 20kg limit) — both must be eliminated before any value comparison, regardless of how good their figures look. For the remaining candidates, build the compound ratio: active nutrient (kg) = bag weight × content %, then divide by price. GreenGro scores 3.0 ÷ 15 = 0.200 kg per £, beating TomatoFeed's 3.96 ÷ 20 = 0.198 kg per £ by about 1%, and clearly beating BloomRich's 0.150 kg per £. Coverage area and shelf life are genuine, consistent data but play no part in this comparison.

Option C (EarthBoost) and D (RootMax) each have a higher raw ratio than GreenGro, but each breaks a different rule stated in the prose — type, then weight — so both must be discarded before ranking. Option E (TomatoFeed) is a genuinely valid, correctly computed candidate, but a close second rather than the winner. Option A (BloomRich) comes from inverting the ratio (treating a higher £-per-kg figure as "better value"), which actually gives the worst ratio among the qualifying bags.

Realising you'd have picked the trap answer a week ago
Animated character looking smug and satisfied, nodding with confidence
GreenGro beats TomatoFeed by about 1% once you actually apply both prose constraints — the kind of margin that's easy to miss and satisfying to catch. If you want more of that feeling on demand, register free and work through the rest of the bank.
Question type 2 of 3Practice bank · ID 195

Finding Procedures

What it tests: Work out the correct sequence of calculations needed to get from the numbers you're given to the answer — not just the right numbers, but the right order, including where a running total needs to be tracked across a boundary such as a daily cut-off.

Approach: Build the sequence one fact at a time rather than searching for a single formula. Subtract any fixed block first, apply ratios next, then work out a capacity limit before tracking totals against it.

Step by step
  1. Remove any fixed allocation stated in the prose before applying a ratio to what's left.
  2. Split the remainder using the stated ratio, in the order the ratio is given.
  3. Work out the capacity per period carefully — watch for a release that happens exactly at the opening time as well as the ones after it.
  4. Track the running total period by period, and notice when it crosses into a new day, session, or period rather than assuming everything happens in one go.

Common trap: each wrong option is a specific mis-step in the sequence rather than a random guess — forgetting to remove a fixed block first, reversing a ratio, miscounting a capacity by one (a "fencepost" error), or ignoring a closing time altogether all produce a plausible-looking but wrong answer.

Scenario

A stadium is selling 6,000 tickets for a concert. 800 tickets are reserved for a members' presale, which is completed entirely before general sale opens (it does not use any box-office release slots). The remaining tickets are divided between Standard and VIP tickets in the ratio 5:3 (Standard:VIP). VIP tickets are sold in batches of 130. A new batch is released every 45 minutes, starting at 10:00am, and each batch sells out completely before the next one is released. The box office is open only from 10:00am to 3:30pm each day. Any VIP batches not yet released by closing time carry over to the next day, again starting at 10:00am.

On which day of the VIP release, and at what time, is the very last VIP batch released — the moment all VIP tickets are sold?

A2:30pm on Day 2
B10:45am on Day 3
C10:00am on Day 3
D10:00am on Day 4
E8:30pm on Day 1
Reveal the correct answer & explanation

Correct answer: A

There's no single formula here — you build the sequence from the facts given. Subtract the fixed presale block: 6,000 − 800 = 5,200 tickets remain for Standard/VIP. Split by the stated ratio (5:3, 8 parts): VIP share = 5,200 × 3/8 = 1,950 tickets. Derive the daily release capacity: the box office window is 10:00am–3:30pm = 330 minutes; releases every 45 minutes starting at opening give floor(330/45) + 1 = 7 + 1 = 8 batches per day (the "+1" accounts for the release at opening, not just the intervals after it). On Day 1: 8 batches × 130 = 1,040 tickets sold, leaving 1,950 − 1,040 = 910 tickets, so the sale rolls into Day 2. On Day 2, 910 tickets need exactly 910 ÷ 130 = 7 batches; the 7th release (10:00, 10:45, 11:30, 12:15, 1:00, 1:45, 2:30) lands at 2:30pm, still inside the 3:30pm window.

Each wrong option is a specific mis-step: E skips the daily cut-off entirely and treats all 15 batches as back-to-back, landing on 8:30pm Day 1. B forgets to subtract the presale block before applying the ratio, inflating the VIP pool. C gets the daily capacity wrong by one batch (a fencepost error), cascading into a Day 3, 10:00am finish. D reverses the ratio (VIP gets 5/8 instead of 3/8), vastly inflating the pool and pushing the finish to Day 4.

Question type 3 of 3Practice bank · ID 205

Identifying Similarity

What it tests: Cross-check plotted or presented data against a source table once a missing value has been derived from a clue elsewhere in the prose — and spot the one point that doesn't survive that check.

Approach: Work out any value the table doesn't give you directly before you check anything else. Then verify every plotted point systematically rather than eyeballing the one that "looks wrong."

Step by step
  1. Find any prose clue that lets you derive a missing figure the table doesn't state directly.
  2. Recompute the correct value using that derived figure.
  3. Check every plotted point against the source data in turn, not just the ones that look suspicious.
  4. Confirm there's exactly one mismatch — if more than one point looks wrong, re-check your derived figure.

Common trap: a plotted point can use the correct x-value (count) while quietly using the wrong y-value (an un-doubled or otherwise un-adjusted total) — so checking only the x-axis, or only skimming the numbers, misses the actual error. Irrelevant detail included elsewhere in the prose is there to be filtered out, not factored in.

Table 1: coins counted in the jar

Before counting, the jar also held 50 loose one-penny coins, which were sorted straight into a separate tin and do not appear in either table. Of the coins that were counted and logged in Table 1, there were exactly twice as many 5p coins as 20p coins.

CoinDenomination (pence)Number countedTin colour
2p235Red
5p5— (not recorded directly)Blue
10p1022Red
20p2014Green
50p509Blue

Exactly one of the points P1–P5 does not correctly represent the data in Table 1 once the missing 5p count is worked out. Which point is mis-plotted?

AP4
BP3
CP5
DP2
EP1
Reveal the correct answer & explanation

Correct answer: D

The task requires cross-checking each plotted point against Table 1, but one row's count isn't given directly — it must be derived from the clue that there were exactly twice as many 5p coins as 20p coins. Table 1 gives 14 twenty-pence coins, so the 5p count must be 2 × 14 = 28, and the correct total value for the 5p coins is 28 × 5 = 140p. Table 2, however, lists P2 as (28, 70): the x-value (28) correctly reflects the derived count, but the y-value has been calculated using the un-doubled count (14 × 5 = 70) instead of 28 × 5. This is the only point that fails to match Table 1 — the other four check out (35×2=70, 22×10=220, 14×20=280, 9×50=450).

The 50 one-penny coins and the "tin colour" column are irrelevant decoys included to test whether you filter out data that plays no part in the calculation. Each other option is a correctly plotted point: picking A, B, C or E instead of D means either mis-multiplying that row or mistaking a correct point for an error.

22
Questions
40
Minutes
~1m50s
Average per question
0
Marks lost for guessing

Three types down. Hundreds of questions to go.

You've now seen how each Problem Solving question type works. Register free to work through the full set of practice questions on the platform at your own pace, with the reasoning laid out the same way every time.

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