Numerical Ability / Reasoning tests assess a test taker’s ability to solve numerically related problems. Some tests focus on mathematical ability, presenting test takers with decontextualised sums they need to answer. Others set numerical questions in work-relevant contexts, requiring test takers to take information from various sources (e.g. tables, graphs, reports) and use this solve problems. As questions in more contextualised tests tend to be presented verbally, such tests also include an element of verbal ability. Tests of Numerical Ability / Reasoning will assess a test taker’s ability to reason with and solve numerical problems but will also provide an indication of their general reasoning ability.
Common elements of numerical reasoning tests are statistical analysis, working with graphs, charts and tables to identify key information, and applying the correct logic to answer a question. Arithmetic, percentages, averages and fractions are also key elements.
Generally speaking, numerical reasoning tests are short, timed assessments presented in a multiple-choice format. Unlike some forms of psychometric testing, there are right and wrong answers in numerical reasoning tests.
Numerical reasoning questions can be tailored to the essential requirements of the role being recruited to such as determining profit margins, calculating percentage increases or decreases in sales, or estimating material quantities. As such, they give employers a good indication of how an applicant would perform in the role in question.
As numerical reasoning tests are timed, they can also provide employers with a good measure of how well an individual works under pressure. Depending on the level and type of role applied for, tests can be quite complex requiring the need to apply a number of processes to draw the right conclusion.
Numerical reasoning tests may employ the use of what are called ‘distractors’. Distractors fall into two types: information that is included which is not relevant to the question; and answer options which are similar to the correct answer or that would be reached if a common mistake was made.
Numerical reasoning tests are rarely used on their own in the recruitment and selection process and are most commonly employed as part of an overall recruitment strategy involving other psychometric tests such as verbal reasoning and personality questionnaires.