Instructions
Click the button below to start.
Each time you click, a different word will be generated.
Practice until you can answer these sorts of questions reliably.
Question
Letters of the word $1$ are arranged. Find the number of ways of arrangements if
- all the letters are used, and there are no restrictions,
- all the letters are used, and the letters $2$ and $2$ must not be next to one another,
- only three letters are used,
- only four letters are used.
Answer
- $4$.
- $5$.
- $6$.
- $7$.