Crack the Codes

As a way to get students to practice mental arithmetic, I compiled this Crack the Codes worksheet. The problems are graded from very easy to hard. Here are two examples:

1. Two Digit Number:

Reel B is an odd number. Reel A times reel B equals 24.

2. Three Digit Number:

Reel A has the highest digit. The answer is divisible by 5. Reel C has the lowest digit. The digits total 18.

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About webmaths

I have been teaching Mathematics in Victorian secondary schools for 30 years. I use the www to make my maths lessons better. I hope this blog will give other teachers some ideas to try in their own classes.
This entry was posted in Teaching Ideas, Worksheets and tagged , , . Bookmark the permalink.

One Response to Crack the Codes

  1. Miss C says:

    What are the answers?

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