Reasoning Practice for NQT Preparation: Explain the Method

These are original reasoning exercises, not a reconstruction of a TCS NQT paper. TCS iON's National Qualifier Test page and the written notice attached to an application are the official sources to consult for a current assessment. They may establish the live format, instructions, eligibility, or timing. This page does not infer any of those details, and it does not publish a score target or a topic-weight claim.

Work from a stated rule

Try this ordering exercise. A team must review four documents. One document must be reviewed before another, a third cannot be first, and the remaining document is free to move. Instead of jumping to an answer, write each rule in a short line and test an ordering against every line. If more than one ordering works, say so.

The skill here is not memorising a puzzle label. It is translating prose into constraints, keeping a record of each constraint, and checking whether a conclusion follows from all of them. That same discipline helps when a question uses unfamiliar names or adds an exception near the end.

Test an assumption with a counterexample

For a statement-and-conclusion exercise, separate what the statement literally says from what seems likely in real life. Suppose a library opens a new study room after students ask for quiet space. The conclusion “every student prefers studying alone” does not follow. Find the smallest detail that proves the conclusion goes further than the statement.

When reviewing an answer, write the missing assumption. If that assumption was not given, do not treat it as a fact. This is a useful habit for data questions as well as verbal reasoning.

Draw relationships before calculating

In a direction exercise, set a starting point, mark each turn, and keep the drawing simple. In a family-relationship exercise, use a neutral symbol for each person and connect only the relationships stated. A diagram makes it easier to notice when the prompt has not supplied enough information.

If the information is insufficient, explain precisely what is missing. Choosing “cannot be determined” is not a shortcut when it is supported by the prompt; it is a conclusion that needs its own evidence.

Review the path, not only the answer

After each set, keep a small error note with four fields: the rule missed, the assumption added, the step where the solution drifted, and the correction. The note should describe your own work, not a supposed pattern from an employer assessment. Over time, it will show whether careless reading, rushed arithmetic, or an untested inference is the main issue.

Create fresh variations by changing names, objects, and order constraints while keeping the logic intact. This is more useful than repeatedly seeing the same answer because it forces you to recognise the rule rather than the wording.

Confirm the live brief separately

Any assessment can change between application windows. Do not use a practice article to decide what is permitted, how a result is evaluated, or whether a registration is open. Read the current official notice for your own application and follow its instructions. If a term is unclear, ask the contact named in that notice rather than relying on an old online discussion.