UCAT Logic Puzzles: A Grid Method That Saves Minutes

Logic puzzles describe people, places or times and a set of clues, then ask which arrangement is true or which statement must be correct. They are the most time-hungry Decision Making questions, so a fixed method matters more here than anywhere else.

Step 1: Pick the strongest clue

Read all the clues once, quickly. Then start with the one that fixes something completely — "Sam sits in seat 3" — rather than one that only links two people. Fixed facts create a skeleton; relational clues then fill it in.

Step 2: Draw, do not re-read

  • For orders and seats, draw a row of numbered boxes.
  • For matching (who has which pet), use a small grid and put ✓ and ✗ in the cells.
  • Every time you place something, cross it off the clue list.

Step 3: Use the options

You do not always need the full solution. If the question asks which statement must be true, test each option against your partial grid. Often only one option survives after two or three clues.

💡 If you have spent a minute and still have no fixed point, flag the question and come back. Logic puzzles are worth the same as quicker questions.

Words to read carefully

  • "Next to" works in both directions; "immediately to the left of" does not.
  • "Between" usually means somewhere between, not necessarily adjacent.
  • "Must" versus "could" — a "could" option only needs one valid arrangement.

Try it now

✏️ Practice question 1Decision Making

Four friends — Ana, Ben, Chloe and Dev — sit in a row of seats numbered 1 to 4. Chloe sits in seat 2. Dev sits immediately to the right of Chloe (in a higher-numbered seat). Ana does not sit in seat 1.

Who sits in seat 1?

✏️ Practice question 2Decision Making

Three students each study one different subject: biology, chemistry or physics. Mia does not study biology. Noah studies chemistry.

Which statement must be true?

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