Outline Mathematics: Find the smallest multiple of 9 with no odd digits

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Outline Mathematics
Number Theory

Smallest multiple of 9 with no odd digits

Here's a problem to tackle:

Find the smallest multiple of 9 with no odd digits.

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Copyright © 1996-2012 Alexander Bogomolny

Solution

Find the smallest multiple of 9 with no odd digits.

(In the applet below, click on the underlined omitted expressions. See what happens.)

This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at http://www.java.com/en/download/index.jsp, download and install Java VM and enjoy the applet.

References

T. Gardiner, More Mathematical Challenges, Cambridge University Press, 2003, p. 110.

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Copyright © 1996-2012 Alexander Bogomolny

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