The Five-Minute Logic Gauntlet
Seven proper puzzles, one right answer apiece, and a scoreboard that respects a good guess.
Seven puzzles lie ahead, each with exactly one correct answer, which makes this the rare quiz where wrong is a real place you can visit. Sequences, an odd one out, a spot of deduction — nothing requiring a calculator, everything requiring a suspicious mind.
Speed matters less than you think and hubris matters more. The traps here are the classics: answers that feel right for roughly four seconds. Distrust your first instinct exactly once per question, check your working like someone is grading it, and find out which of the four tiers claims you at the end.
Read every possible result and what it means →
Inspect the scoring, question by question
The highest possible score here is 21. The original game divides scores into 4 bands; the bands contain different numbers of answer combinations. A high point total is not a measured percentile.
1. What number continues the sequence: 2, 6, 18, 54, …?
- 108 — 2 original points
- 56, give or take — 0 original points
- 162 — 3 original points
- 216 — 1 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
2. One of these does not belong: swan, eagle, bat, owl. Which, and why?
- The swan, because it seems smug — 0 original points
- The bat, because it is the only mammal — 3 original points
- The eagle, because it is the largest — 1 original points
- The owl, because it works nights — 2 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
3. Every plimb is a snock, and no snock can swim. What must be true?
- Every snock is a plimb — 2 original points
- Plimbs can swim, but only when nobody is watching — 0 original points
- No plimb can swim — 3 original points
- Some snocks can swim — 1 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
4. A pencil and an eraser cost $1.10 together. The pencil costs exactly one dollar more than the eraser. What does the eraser cost?
- 10 cents — 2 original points
- 15 cents — 1 original points
- 5 cents — 3 original points
- One dollar — stationery pricing is chaos — 0 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
5. Which letter comes next: J, F, M, A, M, J, …?
- A — 2 original points
- J — 3 original points
- K, alphabetically speaking — 0 original points
- S — 1 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
6. If the day before yesterday was Thursday, what day will the day after tomorrow be?
- Sunday — 2 original points
- Thursday again, since time is a circle — 0 original points
- Tuesday — 1 original points
- Monday — 3 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
7. Three sealed boxes are labelled Apples, Oranges and Mixed, and every label is wrong. You may draw one fruit from one box to deduce all three contents. Which box do you open?
- The one labelled Apples — 2 original points
- The one labelled Mixed — 3 original points
- None of them — demand better labels — 0 original points
- The one labelled Oranges — 1 original points
These are the archived game’s option weights. Partial credit is a game rule, not a clinical or population measurement.
What happens across every possible answer pattern?
We counted all 16,384 patterns, treating each offered choice as equally likely. This is a synthetic rule check, not visitor research. It does not describe how real people answer.
| Result | Patterns | Share of patterns |
|---|---|---|
| The Vibes Theorist | 323 | 1.97% |
| The Promising Suspect | 7,869 | 48.03% |
| The Quiet Deducer | 7,456 | 45.51% |
| The Gauntlet, Cleared | 736 | 4.49% |
Download the full counts · Download Python script · Download rule inputs
To reproduce locally: python3 measure_legacy.py --input legacy-rule-inputs.json --output counts.json. Uses Python 3 and its standard library.
The answer that arrives before you asked for one
Puzzles like these are designed around a quirk of thinking: an answer often appears fully formed, feels obviously right, and turns out to be wrong. Psychologists describe two modes of processing, one automatic and effortless, the other slow and deliberate. Keith Stanovich and Richard West introduced the System 1 and System 2 labels in the late 1990s, and Daniel Kahneman carried them to a wide readership in 2011. The fast mode is not the stupid one; it is the reason you can drive, read faces, and finish other people's sentences. It simply answers a slightly easier question than the one that was asked.
Three questions that started a small industry
In 2005 the economist Shane Frederick published the Cognitive Reflection Test, three items built to catch exactly that substitution. The famous one involves a bat and a ball costing a dollar ten together, with the bat a dollar more than the ball. Almost everyone thinks ten cents; the ball costs five. Frederick ran the test at several universities and found that even among students at highly selective institutions, a majority missed at least one of the three. The pencil-and-eraser question in this set is a direct cousin, and it catches people just as cheerfully.
Where puzzle logic parts company with formal logic
The deduction about plimbs and snocks uses invented words on purpose. Peter Wason built his selection task in 1966 to show how badly abstract rules travel, and later work by Jonathan Evans and others documented belief bias: people tend to accept an argument when its conclusion sounds plausible and reject it when it does not, whether or not the reasoning holds. Nonsense nouns strip that shortcut away and leave only the structure, which is why they feel harder despite being simpler.
Reading your tier with a pinch of salt
Seven items cannot support any claim about your reasoning ability. Instruments used in research carry dozens of items, published reliability figures, and norms gathered from defined populations, and even then researchers argue about what they capture. This has none of that, no standardisation, and no scoring against anyone else. It is not an intelligence test and was never built as one.
Familiarity also does a lot of quiet work. Anyone who has met the sequence puzzles and the mislabelled boxes before will clear the set at speed, which says more about their reading habits than their wiring. The claim that hardly anyone passes is showmanship rather than measurement.
Reading context & limits
For background and a fuller source trail, read Are Online IQ and Brain Tests Accurate?. These references provide context; they do not validate the entertainment result or every historical detail in the archived essay.
- Evidence and brain-training claims — FTC
- Intelligence — American Psychological Association
- IQ — Encyclopaedia Britannica
Content lead: LISA. Updated October 25, 2026. Send a specific factual correction.