The number of trees will remain the same. The answer is 30.
If you count 20 houses on your right going to the store and 20 houses on your left coming home, how many houses did you count?
A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?
There are several books on a bookshelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?
While going to your grandfatherr's house, you counted seventeen houses on the right side. While returning back to your home, you counted seventeen houses on the left side.
How many houses are there between your home and your grandfather's home?
There are 57 ducks walking to a pond. On the way, 15 get lost, 26 head back, and 16 make it to the pond.
What happened to the rest?
