Read the hook
Start with one short claim or number from a real news story.
News-inspired mental model challenges
How good are your guesses about the world?
Test your mental models about the world using real stories from the news. Take a 60-second challenge inspired by the news, make your estimate, reveal the answer, and find out how full of it you are.
How much water fell on eastern Spain?
Storm Adam brought torrential rain to eastern Spain; reporting attributed 632 mm in 36 hours at Pego, Alicante, to AEMET.
80 challenges · Sourced answers · No account required
How it works
Guess. Check. Learn.
Choose the scale
Trust your first instinct and lock in the answer that feels closest.
Check the model
Compare your estimate with the checked scale and see which part of your mental model needs work.
Keep going
Three recent challenges
Matt's results
Strongest area: Public systems and economics
Across 78 scored problems, this is Matt's strongest established subject. Overall reasoning score: 61.8 / 100.
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