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ランダム数字ホイール:1–10、1–50、1–100を回す

部屋全体が着地を見守れるランダム数字ジェネレーター。

ランダムな数字が欲しいとき、素のジェネレーターは平坦に感じることがあります:ボタン、数字、終わり。数字ホイールは同じ仕事を公開で——グループは1から30が流れ、当選にゆっくり止まるのを見ます。教室、ゲームナイト、番号付きチケットの抽選、ビンゴ系なら、見えるスピンがポイントです。

1分以内に数字ホイールを作る

  1. SpinKitのホイールを開く。
  2. 数字を1行1つで貼る。ヒント:表計算で1, 2, 3…と入力し、フィルハンドルをドラッグして列をそのまま貼る。
  3. スピン——各数字が同じ扇・同じチャンス。

適切な範囲を選ぶ

抽選のヒント: きれいな 1 ~ 100 ではなく、実際に販売したチケット番号をホイールに記入します。その後、すべてのスピンが実際のチケットに着地し、デッドドローは発生しません。

繰り返しなし:ビンゴパターン

ビンゴ、トムリラ、終わりまで引くゲームではスピンで当選者を外すをオンに。引いた番号はホイールを離れ、プールは縮み、二度出ない——ケージから玉を抜くデジタル版。スピン履歴がコール記録にもなり、本格ゲームならビンゴコーラーガイドも。

独立した抽選:繰り返しを残す

各抽選が独立——サイコロ風、ランダムなページ番号、ラウンド用の数字——なら外しをオフに。同じ数字が連続するのは稀でも完全に公正で、番号を外すと残りのオッズが静かに歪みます。

ホイールが向いていない場面

1から10,000、または一度に千回の抽選が必要? それはスプレッドシート領域:Spin Sheetは任意サイズのリストからランダム行を引き、結果を書き出せます。ホイールが居場所を得るのは、人が見守っているときです。

Inclusive ranges, and the 1–100 trap

Say the range out loud before you paste it. “One to a hundred” almost always means both ends count: ticket 1 and ticket 100 are real tickets. Spreadsheet fill handles are good at this; typing “1–100” into a chat and then pasting 1 through 99 is how raffles quietly lose a sold ticket. Count the slices. If you sold 87 tickets, the wheel should have 87 numbers — not a clean 1–100 with thirteen dead draws.

The same trap shows up in classrooms as “pick a page between 1 and 30”. If page 30 is the last page of the chapter, it belongs on the wheel. If you meant “a page we have actually read”, paste that shorter list. A number wheel is only as honest as the range you gave it.

Dice replacement — and when it is the wrong homework tool

A 1–6 wheel is a fine substitute for a missing die: big slices, a result the table can see, and no argument about a cocked roll. A 1–20 wheel does the same job for a classroom that is playing a one-shot and left the dice at home. Leave removal off. Independent rolls are allowed to repeat; a die that cannot roll 4 twice in a row is not a die.

Do not use a number wheel to “prove” a probability homework. The point of that work is usually a recorded sample from a stated generator, with the method written down. A theatrical spin is the wrong artefact. If the assignment wants 200 samples of a fair d6, a Spin Sheet column of 1–6 drawn with replacement, then exported, is the honest record. Use the wheel when the room needs to watch one number land — not when a spreadsheet of samples is the actual deliverable.

Number of the day, without turning it into a popularity contest

Primary classrooms often want a number of the day: a 1–20 or 1–100 that becomes the counting, place-value or times-table focus. Put the range on a saved wheel, spin once at the start, and leave the result on the board. If yesterday’s number should not repeat this week, turn removal on for the week and reset on Monday. That is a bingo cage for numbers, not a raffle — and it stops the same “lucky 7” arriving four days running while still looking fair to the class.

Keep the wheel on the device, not in a shared account the class can edit. Local-first means the register of remaining numbers lives where you spun it. If you need the same wheel on a second machine, copy it on purpose. A number-of-the-day that silently syncs from last period’s leftover list is how Thursday inherits Wednesday’s removals without anyone noticing.