need answer asap

One of the horses is pregnant

As it is worded above this riddle doesn't work.

Try ten horses into nine stables.

oh, I remember this one...

it's where someone takes 5 matchsticks and makes them into the number 10....then you move the "1" and move it to the bottom of the "0" making it a 9.

Ten Horses = Nine Stables
It wouldn't be so much fun if I just told you the answer.

However, the question might say:

Draw nine boxes to represent nine stables.

Put ten horses into the nine boxes so that only one is in each.

(You will only need ten stables if you leave a space in the fourth stable.)