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Properties of addition and mutiplication puzzle : ...The remaining digits should be your telephone number.

Follow the steps to see if the puzzle works.

§ Start with 60 and divide by 2.
§ Add your telephone number.
§ Subtract 25.
§ Multiply by 3.
§ Subtract 15.
§ Multiply by 2
§ Divide by 6.

The remaining digits should be your telephone number. Why does this work? What properties of addition & multiplication is this problem utilizing?

Solution Summary

A puzzle is solved usng properties of addition and mutiplication.

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