DSA Cadet Selection study materials
DSA Cadet Selection study resources

DSA Cadet Selection: Academic Foundation (English, Mathematics, Science)

DSA Cadet Selection · Work through your exam, one topic at a time.

All guide sections

Academic Foundation (English, Mathematics, Science)

What this domain tests

The Academic Foundation domain checks whether you can use school-level English, mathematics and science accurately under time pressure. English items test comprehension, grammar and vocabulary in context; mathematics tests arithmetic, algebra, geometry and data interpretation; science tests basic physics, chemistry and biology concepts and their application to training, equipment and safety. The exam is not asking for memorised definitions alone: it rewards careful reading and correct application.

Core rules and concepts

  • In English, answer from the passage, not from general opinion. Watch qualifiers such as not, except and best.
  • In mathematics, write the quantity you are finding, keep units consistent, and use estimation to check reasonableness.
  • In science, identify the variable being changed, the variable measured, and the safety or equipment implication.

Worked example

A vehicle travels 120 km in 2 hours, then 90 km in 1.5 hours. What is its average speed for the whole journey? Reasoning: average speed is total distance divided by total time, not the average of the two speeds. Total distance = 120 + 90 = 210 km. Total time = 2 + 1.5 = 3.5 hours. Average speed = 210 ÷ 3.5 = 60 km/h. The common wrong method, (60 + 60) ÷ 2, happens to give 60 here, so check the method, not only the answer.

Traps that cost marks

Averaging rates without weighting by time or distance; mixing metres and kilometres; choosing a science option that is true in general but does not answer the question; and in English, selecting a word that fits the topic but not the grammar of the sentence.