It is up to the invigilation centre to decide when and how the tests should be scheduled, as long as all parts of the tests have been taken prior to the earliest senior school deadline on the applicant profile.
The four sections of the test can be taken all at once, all on different days, or they could be grouped so that two tests are taken at once.
Usually the tests are taken over two days: English and Verbal Reasoning on one day and Mathematics and Non-Verbal Reasoning on another.
It may be preferred that all four tests are taken on one day to reduce the amount of traveling, should the test not be sat at the applicant's current school.
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