In one of the pens, put two cows.
you put 5 in one and 1 in the other three
Put 2 cows in one pen
I dont know
the farmer had 15 animals in the farm, and if all but 9 sheep died then 9 sheep would be left, equaling 9 animals in total.
he has 9
The farmer has eight cows, since all but that many died.
Nine.
10 Cows. Ten. He Decided to Keep 10 cows, so that is how many he has. He must have had 19 to begin with; since he gave 9 away.
Eat onr
eat 5 sheep
On this farm there would be a total of 18 cows. There would also be 18 chickens, combining to make 36 heads and 104 legs.
In 4 boxes there are a total of 48 pens. Divide 48 by 4 and this will give you how many pens are in 1 box. 48/4 = 12. To find how many pens are in 9 boxes multiply 12 by 9. 12x9 = 108. There are 108 pens in 12 boxes
This style of question is the general type which has VERY useful answers in some real life circumstances. In real life, there are often more constraints. In this present question, there are lots of allowable answers. Let's look at a few. If I have 100 to spend, and cows cost 10, pigs cost 3 and rabbits cost 0.5 then I could buy 10 cows OR 9 cows and 20 rabbits, OR 9 cows and 3 pigs and 2 rabbits OR 9 cows and 2 pigs and 8 rabbits ....and so on.....
No. The sum of four odd numbers will always be an even number!