Math CentralQuandaries & Queries


Question from David:

Sam chose the number 35 and made up these clues."my number is odd. It is a multiple of 5. It's other factor is greater than 5. My number is less than 40. What is my number and what is it's other factor? Are Sam's clues correct?

Hi David,

The number has a factor of 5 and is less than 40. 40 divided by 5 is 8 so the other factor, as well as being greater than 5, is less than 8. What can this second factor be?


About Math Central
* Registered trade mark of Imperial Oil Limited. Used under license.


Math Central is supported by the University of Regina and the Imperial Oil Foundation.
Quandaries & Queries page Home page University of Regina Imperial Oil Foundation