I'm thinking of a number.
- if it is not a multiple of 4, then it is between 60 and 69
- if it is a multiple of 3 it is between 50 and 59
- if it is not a multiple of 6 it is between 70 and 79.
What is the number?
This one is fairly simple because the number must lie between 50 and 79. So guessing and checking is plausible. But it is still possible to go about it systematically.
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Posted by Rhys
on 2004-10-17 03:56:48 |