Solution:

68

Explanation:
(9 * 7) + 5 = 68

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:

split personality

Solution:

Chile

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:

I am a compass.

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

Solution:

Cry over spilt milk.

Solution:

10 percent of student study all four subjects.

Solution:

I am Stamp.

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.