The Big Mac makes it blunt. The same burger reads 5.29 in the eurozone, 1,090 in Iceland, a few thousand won in Korea. The hardest part of loading that data was exactly this: by the number alone, the Iceland Big Mac looks 200 times pricier than Europe's. Convert to dollars and both sit around $6–8. The brain swallows \"1,090\" first and remembers it's króna a beat later. CEO pay was the same — comp mixed across dollars, won, and yen, and the moment it's written in won it gains three zeros and the difficulty jumps.
Mixing up billions and trillions isn't stupidity
It's because the brain compresses large numbers like a log scale. The cognitive scientist Stanislas Dehaene showed our \"number sense\" is sharp for small numbers like 1, 2, 3 but smears the gaps as they grow. The gap between 1 and 2 million is vivid; 1 versus 2 trillion just reads as \"both enormous.\" Confusing a hundred million with a trillion isn't ignorance — we're wired that way.
So I lock the digit count first
When tuning difficulty, I looked at the \"digit jump\" before the size of the price. Group similar digit counts and the round is easy; mix a thousand-won item with a hundred-million-won one and accuracy hits the floor. The price isn't hard — hopping across units is.
One practical line: when you guess, don't reach for the exact figure first — pin down \"how many digits is this?\" Decide whether it's tens of millions or hundreds of millions, and the leading digit rarely strays far. Miss the digit count once and you're off by 10x or 100x.
This is not investment advice. It doesn't tell you to buy anything, and what's written here is what I observed while building the game data — not a statistic gathered from users' guesses. Read it as a note on the sense of reading prices.
Want to test your own digit sense? Try the coin quiz or the daily price.