Question

Old McDonald has 9 pigs. How can he build 4 pens and place and odd number of pigs in each pen?

Answer 1

Sorry, the only way I could imagine it being done is to leave one pig out of the pens. Is your stated information correct?

1 + 1 + 1 + 6 = 9
1 + 1 + 3 + 4 = 9

Sorry I can't be of more help.

Answer 2

Thanks but that is exactly how the question is stated.

Answer 3

Build 3 pens with 3 pigs in each then a fourth pen around the 3 pens.
Job done