AOSB Aptitude study guide
AOSB Aptitude · Work through your exam, one topic at a time.
The Army Officer Selection Board (AOSB) Aptitude Assessment is the psychometric and practical stage of officer selection for the British Army. It is aimed at candidates who have applied for a commission and need to demonstrate the reasoning ability, planning skill and personal qualities expected of a potential officer. The AOSB Aptitude study guide has 6 sections and about 1,607 words.
01Verbal Reasoning: Reading for Logic, Not for Interest
Verbal reasoning at AOSB tests whether you can extract a precise claim from dense prose and judge what follows from it. The core concepts are: the conclusion (what the passage asserts), the evidence (what supports it), necessary versus sufficient conditions , quantifiers (all, some, none, most), and scope (whether a statement is about a group, a sample, or an individual).
274 words, about 1 min02Numerical Reasoning: Speed, Estimation and Ratio Sense
Numerical items under time pressure reward structure over arithmetic . The concepts you need are: ratios and proportion , percentages and percentage change , rates (speed, work, flow), averages and weighted averages , unit conversion , and reading tables and graphs accurately .
260 words, about 1 min03Abstract and Spatial Reasoning: Rules, Rotation and Nets
Abstract reasoning asks you to find the rule governing a sequence or set, then apply it. Spatial reasoning asks you to manipulate objects mentally.
283 words, about 1 min04Planning and Problem Solving: Constraints, Priorities and Time
Planning exercises test whether you can organise limited resources against fixed constraints. The concepts are: constraints (time, people, equipment, dependencies), critical path (the longest chain of dependent tasks, which sets the minimum duration), sequencing and dependencies (what must precede what), resource levelling (moving flexible tasks to free a scarce resource), prioritisation by importance and urgency, and contingency - what you will sacrifice if something slips.
266 words, about 1 min05Group and Practical Leadership: Contributing, Listening, Leading
Group exercises are assessed on behaviour observed , not on whether the group finishes. Assessors look for task behaviour (setting objectives, summarising, proposing a plan, checking progress) balanced with team behaviour (including others, listening, resolving conflict, supporting a weaker member).
264 words, about 1 min06Interview and Personal Qualities: Evidence, Honesty, Motivation
The interview probes motivation, self-awareness, resilience and integrity . The concepts are: evidence-based answers (a specific example beats a general claim), the STAR structure (Situation, Task, Action, Result), self-awareness (knowing your strengths, limits and what you are working on), values alignment (why military officership, why now), and handling pressure (staying composed when challenged).
260 words, about 1 min