Wednesday, October 21, 2026 · Played it? Here's how rare each one really was.
350,757 hand flips, 2023 study.
1 in 2 flips 50.8%
Researchers recorded 350,757 flips and found the coin landed on the side facing up at the start 50.8% of the time.
Fun fact: It sounds like a fair 50/50, but call the side facing up and over 1,000 flips you'd win about 8 extra times.
Source: Bartoš et al. (2023), arXiv
Survey of 1,401 people, 2015.
1 in 3.3 people 30.0%
In the study, 30% saw the dress as white/gold, 57% as blue/black, 11% as blue/brown and 2% as something else.
Fun fact: Your view isn't fixed: of people who had seen it before, 45% said their perception had switched since first seeing it.
Source: Lafer-Sousa, Hermann & Conway, Current Biology (2015)
Average for people of European origin, from a review of 370+ samples.
1 in 3.6 people 27.5%
Among people of European origin, PTC non-tasters average 27% to 28%; this uses 27.5%.
Fun fact: To about 1 in 4, this chemical tastes of nothing; to most others it's very bitter. Elsewhere, non-tasters are often just 10% to 16%.
Birthdays spread evenly over a 365-day year.
1 in about 12 friends 8.34%
Add up each month's chance squared: (7×31² + 4×30² + 28²) ÷ 365² = 8.34%, slightly more than 1 in 12.
Fun fact: Ask 12 friends and there's about a 65% chance at least one of them shares your birth month.
Source: Math: 11,111 ÷ 133,225
A physics model checked with experiments.
1 in 6,000 tosses 0.017%
Physicists modeled coin tosses and checked them with experiments; they estimated a US nickel lands on edge about 1 in 6,000 tosses.
Fun fact: Toss one every 10 seconds and you'd expect an edge landing about once every 17 hours.