Cognitive reflection · 8 puzzles · no timer
Your gut is fast. Is it right?
Eight short puzzles where the first answer that pops into your head is tempting. Take your time, check your reasoning, then lock it in.
Free. No account needed. No clock ticking.
A warm-up trick
Quick one.
Don’t think too hard.
This one is a classic, and it is not in the test. Tap an answer and watch who gets there first.
How many animals of each kind did Moses take on the ark?
ToyNot one of the eight. Nothing is scored or saved.
How it works
Eight puzzles.
Zero clocks.
Short reasoning questions built on common maths and logic structures. Some are easy. Some have a trap door.
- 01 Pick an answer
Whatever your gut says first is fine. It’s a starting point.
- 02 Check, then confirm
Look at your reasoning once more before you lock it in.
- 03 Explanations at the end
After all eight, you see every answer and the reasoning behind it.
What you get
Your score.
Every why.
How many of the eight you got right, then a review card for each puzzle: what you picked and the reasoning behind the answer.
correct in this set
How many months have 28 days?
All twelve do. February is just the only one that stops there.
A farmer has 15 sheep. All but 8 wander off. How many are left?
“All but 8” means 8 stay behind.
Which weighs more: a kilo of feathers or a kilo of bricks?
A kilo is a kilo. The bricks just look heavier.
Made-up puzzles, not the real eight.
The honest part
A puzzle set.
Not a verdict.
This original puzzle set is not the standardized Cognitive Reflection Test and is not an IQ score. Prior familiarity can affect your performance.
Not an IQ score
It counts correct answers in this set of eight. That is all it counts.
Not the standardized CRT
These are original TPP puzzles, not the published test.
Seen these before?
Knowing a puzzle type can help. That’s normal, and worth keeping in mind.
Where the puzzles come from
Eight TPP-authored reasoning questions using common mathematical and logical problem structures.
Can I pause part-way?
Yes. Your answers save as you confirm them, and guest progress stays in this browser. Explanations wait until you finish the set.
Slow down.
Start.
8 puzzles · No timer · Explanations at the end · Free