Solution:

This is because I have three quarters, four dimes and four pennies contributing to $1.19. But in no way I can pay a dollar exactly.

Solution:

I am Stamp.

Solution:

10 percent of student study all four subjects.

Solution:

Cry over spilt milk.

Solution:

I am a compass.

Because I am a compass and I help people navigate all around the world.

Solution:

Augustus and Joshua play all the three sports. Stacy plays none.

This is when we have assumed that girls do not play football at all. If by any means, the school has a girl's football league, all we know is that one of the three play no sports at all and the others play all the three.

Solution:

Chile

Solution:

split personality

Solution:

Two people.

The question mentions that a couple went to see a wildlife sanctuary. There is no mention that the rest of the people went along.

Solution:

68

Explanation:
(9 * 7) + 5 = 68