1, 10 Wheel
Pick a number between 1 and 10. SpinyWheel's 1–10 Wheel holds all ten whole numbers and gives each one a flat 10 percent chance, which is more than can be said for the human version of the same request. Teachers, gamers, and tiebreakers spin it.
Why does everyone pick 7?
Ask a room to name a number from 1 to 10 and 7 comes back far more often than 10 percent of the time. Informal surveys of the question have landed on it repeatedly, and the usual explanation is that 7 feels the least chosen, which is exactly why it gets chosen.
The reasoning behind it is worth watching. People skip 1 and 10 as too obvious, skip 5 as the boring middle, and avoid even numbers because they feel less arbitrary. What is left is 3 and 7, and 7 wins. Every one of those moves is a preference, which means a human "random" number is not random at all. SpinyWheel's 1–10 Wheel has no such instinct, so 7 lands 10 percent of the time and so does 10.
What are the odds on a 1–10 wheel?
Every number on SpinyWheel's 1–10 Wheel holds a 1 in 10 chance and occupies a 36 degree slice. Those odds do not shift with history, so a number that just landed is exactly as likely as one absent for fifty spins.
What grows with more spins is coverage, not fairness:
| Spins | Chance a given number has appeared |
|---|---|
| 1 | 10% |
| 3 | 27.1% |
| 7 | 52.2% |
| 10 | 65.1% |
| 22 | 90.2% |
Ten spins is not enough to see all ten numbers. It takes about 29 on average, and the last two hold out longest. Anyone who expects a full sweep in ten is applying deck-of-cards logic to a wheel that keeps every number in play every time.
The wheel and the ten sided die
A ten sided die produces the same flat 10 percent, so the math is identical, but the physical die carries a quirk: most d10s are numbered 0 through 9, with the 0 face read as 10 by convention. That trips people up in games where 0 and 10 mean different things.
A wheel avoids the translation because the labels say what they mean. If you actually want zero as its own outcome rather than a stand-in, the 0–10 Ultimate Number Wheel holds eleven numbers at 9.1 percent each. For larger draws the 1–100 wheel drops each number to 1 percent, and the yes or no wheel covers the times a number was never the question.
Drawing several numbers without repeats
Delete each result before the next spin and ten draws produce all ten numbers in exactly ten spins. Leave the list alone and the same ten spins will typically miss three or four numbers entirely while repeating others.
Which behavior you want depends on the job. A tiebreaker wants independent spins, since each round should start fresh. Assigning ten people to ten slots wants removal, because a repeat there is not a fun coincidence, it is two people holding the same slot. The how-to guide covers building the list, and the tips page goes into running a draw people will accept.
FAQ
Each spin is independent, so all ten numbers hold 10 percent every time no matter what came before. Two matching spins in a row happen about once per 10 pairs, and a named number doing it happens once per 100. Clusters like that are the ordinary output of independent spins, and their complete absence would be the suspicious result.
Because people filter before answering. The ends feel obvious, the middle feels lazy, and even numbers feel too tidy, which leaves 7 as the number that seems most arbitrary. Everyone reasoning that way arrives at the same place, so the random answers cluster. A wheel skips the reasoning and lands where it lands.
Remove each result from the list before the next spin, which gives all ten in exactly ten spins with no duplicates. Left untouched, ten spins usually leave three or four numbers unseen. Full coverage without removal takes about 29 spins on average, roughly three times the length of the list.
Yes. Edit the entry list and the odds follow: twenty numbers gives each 5 percent, eleven gives each 9.1 percent, five gives each 20 percent. The spin, the pointer, and the result readout work the same at any list length, so only the arithmetic on screen changes.
Spin it, read the number, and resist the urge to say you were thinking of 7.