using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Christina makes tasty toast in a small pan. After toasting one side of a slice, she turns it over. Each side takes 30 seconds. The pan can only hold two slices.
How can she toast both sides of three slices in 1 & 1/2 instead of 2 minutes?

How can one talk without saying a single word?

There are three cows, two dogs, and one cat: How many legs do you have?

I am the fastest animal but cannot climb the tree. What am I?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

What has many teeth, but cannot bite?

I drive at an average speed of 30 miles per hour to the railroad station each morning and catch my train. On a particular morning, there was a lot of traffic and at the halfway point, I had averaged only 15 miles per hour. How fast must I drive for the rest of the way to catch my train?

What does below rebus means ?

Decode this picture on T-Shirt and tell what it says ?