Scheltrum

Random Number Between 1 and 10

Ten outcomes, each with a flat 10 percent chance. The interesting part is not the tool but the contrast: people asked to pick a number from one to ten do not choose evenly.

1 to 10 1

10 possible values, each equally likely. Tick nothing and repeats can happen; that is what random means.

Ten percent each, no favourites

Ten equally likely outcomes gives every value a flat 10 percent chance. Ask a person instead and the answer is nothing like flat. When people are asked to name a number from 1 to 10, 7 comes back far more often than a tenth of the time, while 1 and 10 come back least: the ends feel like cheating and 7 feels the most “random” to say. That gap is the whole reason to press a button rather than pick in your head.

What the numbers do over several draws

  • Two draws match 10 percent of the time.
  • By the fourth draw, the chance that two draws share a value is 49.6 percent, and by the fifth it is 69.76 percent.
  • Over ten draws, the chance a particular number, say 7, never shows at all is 34.87 percent.
  • Seeing all ten values at least once takes about 29.3 draws on average, not ten.

Scoring out of ten

A random 1 to 10 is not a rating. If you are using it to score something, remember the tool has no opinion; it is only useful where you genuinely do not mind which number lands.

Everyday uses

Deciding who goes first, choosing a question number, assigning ten seats, settling a guessing game, picking one of ten options in a list. For a wider spread use 1 to 100, and to draw from actual names or options rather than numbers use the random picker or set your own bounds on the main generator.