The majority of firms use psychometric tests to narrow down their pool of candidates. You may be required to complete one, or a selection, of numerical, verbal, logical and situational judgement tests.
There are two companies which provide the majority of numerical, verbal and logical reasoning tests, both of which provide a limited selection of free practice tests online:
The key to psychometric tests is efficiency. The majority of candidates could answer all questions correctly, if given enough time. Therefore, employers must distinguish applicants by the speed with which the questions are answered. The simple way to pass these tests quickly is to practise.