Posted by barbara on Saturday, June 6, 2009 at 11:51am.
Indicate whether the deductive reasoning used is an example of affirming the hypothesis or denying the conclusion.
If a number is divisible by 3, then the sum of the digits of that number is divisible by 3.
The sum of the digits of a number is not divisible by 3. Therefore the number is not divisible by 3.

teaching math  bobpursley, Saturday, June 6, 2009 at 12:03pm
see other post.