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Home / Plan, Teach and Assess / Planning / Maths Eyes / Browse by strand / Probability / Credit crunch

Credit crunch

Prompts

David's Personal Identification Number (PIN) is a 4-digit square number. How many possibilities are there?

Jessie's bank allows her to choose her own 4-digit PIN. How many choices does she have?

However, Jessie's bank does not allow the first digit of a PIN to be zero. How many choices does she now have?

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Maths in Schools: Teaching and Learning Resources to Support Mathematics is funded by the Australian Government Department of Education and managed by Education Services Australia.

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