UCAT Logic Puzzles: how to solve them
A logic puzzle gives you a small group of people or things, some positions to place them in, and a handful of constraints, then asks you to work out the arrangement, or one fact about it. It’s a Decision Making question type solved by elimination, not calculation: apply each clue, rule out what it forbids, and the answer follows.
What is a logic puzzle question?
You’re given a short scenario (say, five speakers in five time slots, or four guests each assigned one main dish), plus a list of constraints such as “Reza presents immediately after Priya” or “Chloe is gluten-free.” Your job is to combine the constraints until you can place every item, then answer a single direct question (“Who presents on Thursday?”). No outside knowledge is needed, and there’s no real arithmetic, only careful elimination.
The whole type turns on one idea: each clue removes possibilities, and removing one possibility often forces the next. A clue like “Reza presents immediately after Priya” instantly locks those two into a Priya→Reza pair that has to sit somewhere as a block. Work the clues in a sensible order and the grid resolves itself; jump around and you end up re-reading the stem five times.
Solve a logic puzzle, then watch the grid resolve
Here’s a representative item. Pick the answer, then check. The full reasoning unpacks below, one clue at a time, on a grid you can step through.
Four colleagues (Nadia, Omar, Priya and Reza) each give a project update on a different day, Monday to Thursday, with one update per day.
- 1Nadia’s update is earlier in the week than Priya’s.
- 2Omar does not present on Monday or Thursday.
- 3Reza presents on the day immediately after Priya.
Who presents on Thursday?
A grid method that holds up under time pressure
The traps to watch for in logic puzzles
Across logic puzzles, the wrong answers tend to come from a handful of recurring traps. These are the ones we see most often, based on our analysis of recent papers. Each has its own short guide with a worked example.
Trap guides are being published. Links open as each goes live.
Volume builds the grid instinct
Logic puzzles improve fastest through volume. The grid method becomes automatic once you’ve worked through enough of them, and you start spotting each trap the moment a clue is worded to bait it.
MedPath drills logic puzzles trap by trap, with a worked, interactive grid for each, and steers your practice toward the traps you keep falling for.
Practise logic puzzles adaptively.
MedPath drills logic puzzles trap by trap, with a worked interactive grid for each, and steers practice toward the traps you keep falling for.
Logic puzzles, in short
Do I need outside knowledge or a calculator for logic puzzles?+
No. Everything you need is in the clues, and you solve by elimination rather than arithmetic. Decision Making does give you a simple on-screen calculator, but logic puzzles rarely call for it.
How are logic puzzles scored?+
As part of Decision Making, they count towards its 300–900 scaled score. Most logic puzzles are single-best-answer, so unlike the multi-statement Decision Making types, there’s usually no partial credit; you need the right arrangement to earn the mark.
What’s the most common mistake?+
Settling on the first arrangement that seems to work without checking it against every clue, or assuming the whole grid is fixed when only the entity the question asks about is actually pinned.