Reasoning Questions: Finding the Rule Before the Answer

In the GIA, the reasoning section tests whether you can work out what is going on in a situation you have not seen before. It does not depend on school knowledge. It asks you to find a rule from a few examples, or to draw a conclusion from stated facts. People often describe the experience as "seeing" the answer or not, but there is a repeatable procedure, and using it makes the difference between guessing and knowing.

The core habit: say the rule out loud (in your head)

The most common reasoning mistake is looking at the answer options too early. Options are designed to look tempting, and several will fit part of the pattern. If you let them in before you know the rule, you end up choosing whichever feels most familiar. Instead:

1. Look at the given items only and cover the options if you can.
2. Describe what changes between one item and the next, in a plain sentence.
3. Predict the next item before looking at the options.
4. Only then find the option that matches your prediction.

If your prediction matches no option, your rule was probably wrong or incomplete. That is useful information, and it is cheaper to discover than a wrong answer.

Visual patterns

Visual sequences change by a small set of things: position, rotation, size, shading, count and which parts are present. Check them one at a time, in that order. Most puzzles change only one or two things per step.

In the example, size, shading and shape stay the same, and only the position of the triangle changes. It moves one corner clockwise each step: top-left, top-right, bottom-right. The next position clockwise is bottom-left, so that is the answer, found without looking at any options. Notice how little the rule needs: one object, one movement.

When two things change at once

Some items combine two independent rules, for example the triangle moves clockwise while the square alternates between filled and empty. Treat each as its own sequence. Predict both, and then look for the option that has both. Options that satisfy only one rule are the typical wrong answers.

Number patterns

For number sequences, look at the differences between neighbours first. If the differences are constant, the sequence adds a fixed amount. If the differences themselves change steadily, look at the differences of the differences. If the numbers grow very fast, test for multiplication.

Worked example: 4, 7, 12, 19, 28, ?. The differences are 3, 5, 7, 9. These differences rise by 2 each time, so the next difference is 11 and the next number is 39. Written as a rule: add an odd number that increases by two each step.

Worked example: 3, 6, 12, 24, ?. Each is double the one before, so the answer is 48. If you spend time on differences here, you find 3, 6, 12, which is also doubling, so you can see that the pattern is multiplicative rather than additive.

Alternating sequences are a classic trap. For 2, 20, 4, 18, 6, 16, ?, treat the odd and even positions separately: 2, 4, 6 going up by two, and 20, 18, 16 going down by two. The next number, in an odd position, is 8.

Logic statements

Some reasoning items give a short set of statements and ask what must be true. The key is to stay within the statements and avoid adding what you think is probably true in real life.

Worked example. Statements: All the reports in the folder are signed. Some signed documents are late. Which statement must be true?

• (a) Some reports are late.
• (b) All signed documents are reports.
• (c) Every report in the folder is signed.

Only (c) is guaranteed, since it restates the first statement. For (a), the late documents might all be signed documents that are not reports. For (b), the first statement says reports are signed, not that all signed documents are reports. Words such as "all", "some" and "must" do all the work in these questions, so read them as a lawyer would.

Tracking what you know

If a logic item has several steps, write the facts as short notes if you are allowed paper, or hold at most three facts in your head and build up one step at a time. When it gets heavier than that, your time budget is probably better spent elsewhere.

Common mistakes in reasoning

• Anchoring on the first idea. You see one pattern and stop looking. Always ask whether a second rule also fits the data.
• Using real-world assumptions. Logic questions test the statements, not what usually happens.
• Over-complicating. The intended rule is nearly always simple. If your rule needs three exceptions, look for a better one.
• Ignoring the clock. If you cannot see a rule after a short time, move on and come back only if time remains.

How to practise

Make a habit of writing the rule for every practice question, including the ones you get right. Over a few sessions you will notice that the same handful of rules recur, such as add a constant, double, rotate, alternate, and toggle shading. Knowing those families is what turns a first impression into a fast answer. Reasoning also gets help from the spatial skills in the spatial guide when the patterns are visual. Put it into practice with the seven-day plan.

Frequently asked questions

Is reasoning the same as IQ?

Reasoning is one part of general cognitive ability. A single section is not an IQ score, and how any employer interprets it varies.

What if I cannot find the rule?

Skip it. Return later if time allows. A stubborn puzzle can cost more time than several easy items, and the easy ones are worth the same.

Should I look at the options first to save time?

For most people, no. Options bias your thinking toward familiar-looking answers. Predict first, then match.

Are number sequences always about addition?

No. Subtraction, multiplication, alternating series and combined rules all appear in aptitude tests generally. Check differences first, then ratios, then alternating positions.