Where have these puzzles come from?
In the first instance, you should note what was said here: http://www.mathhelpforum.com/math-he...de-189886.html
What thoughts have you had on these puzzles?
Where have these puzzles come from?
In the first instance, you should note what was said here: http://www.mathhelpforum.com/math-he...de-189886.html
What thoughts have you had on these puzzles?